Siedeblut-Zauberer

Immer wenn der Siedeblut-Zauberer ins Spiel kommt, übernimmst du die Initiative.
Krone des Wahnsinns — {1}{R}, opfere ein Artefakt oder eine Kreatur: Stachle eine Kreatur deiner Wahl an. (Bis zu deinem nächsten Zug greift die Kreatur in jedem Kampf an, falls möglich, und greift einen anderen Spieler als dich an, falls möglich.)

Hechicero instigador

Siempre que el Hechicero instigador entre al campo de batalla, tomas la iniciativa.
Corona de la locura — {1}{R}, sacrificar un artefacto o criatura: Incita a la criatura objetivo. (Hasta tu próximo turno, esa criatura ataca cada combate si puede y ataca a un jugador que no seas tú si puede.)

Ensorceleur bouillesang

À chaque fois que l'Ensorceleur bouillesang arrive sur le champ de bataille, vous prenez l'initiative.
Couronne du dément — {1}{R}, sacrifiez un artefact ou une créature : Incitez une créature ciblée. (Jusqu'à votre prochain tour, cette créature attaque à chaque combat si possible et attaque un joueur autre que vous si possible.)

Stregone del Sangue Ribollente

Ogniqualvolta lo Stregone del Sangue Ribollente entra nel campo di battaglia, prendi l'iniziativa.
Corona di Follia — {1}{R}, Sacrifica un artefatto o una creatura: Sprona una creatura bersaglio. (Fino al tuo prossimo turno, quella creatura attacca in ogni combattimento un giocatore diverso da te, se può farlo.)

血たぎるソーサラー

血たぎるソーサラーが戦場に出たとき、あなたはイニシアチブを得る。
クラウン・オヴ・マッドネス ― {1}{R},アーティファクトやクリーチャーのうち１つを生け贄に捧げる：クリーチャー１体を対象とする。それを使嗾する。（次のあなたのターンまで、そのクリーチャーは、可能なら各戦闘で攻撃し、可能ならあなたでないプレイヤーを攻撃する。）

끓어오르는 피 소서러

끓어오르는 피 소서러가 전장에 들어올 때, 당신이 이니셔티브를 차지한다.
광기의 왕관 — {1}{R}, 마법물체 또는 생물 한 개를 희생한다: 생물을 목표로 정한다. 그 생물을 자극한다. (당신의 다음 턴까지, 그 생물은 매 전투마다 가능하면 공격하고 가능하면 당신이 아닌 플레이어를 공격한다.)

Feiticeiro do Sangue Fervente

Toda vez que Feiticeiro do Sangue Fervente entra no campo de batalha, você assume a dianteira.
Coroa da loucura — {1}{R}, sacrifique um artefato ou uma criatura: Atice a criatura alvo. (Até seu próximo turno, aquela criatura ataca a cada combate, se estiver apta, e ataca um jogador que não seja você, se estiver apta.)

Чародей Кипящей Крови

Каждый раз, когда Чародей Кипящей Крови выходит на поле битвы, вы получаете инициативу.
Корона безумия — {1}{R}, пожертвуйте артефакт или существо: разъярите целевое существо. (До вашего следующего хода то существо атакует в каждом бою, если может, и атакует не вас, а другого игрока, если может.)

沸血术士

每当沸血术士进战场时，你掌握先制。
疯狂冠冕～{1}{R}，牺牲一个神器或生物：煽惑目标生物。（直到你的下一个回合，该生物每次战斗若能攻击，则必须攻击，且若能攻击除你以外的牌手，则必须如此作。）

沸血術士

每當沸血術士進戰場時，你掌握先制。
瘋狂冠冕～{1}{R}，犧牲一個神器或生物：煽惑目標生物。（直到你的下一個回合，該生物每次戰鬥若能攻擊，則必須攻擊，且若能攻擊除你以外的玩家，則必須如此作。）

Bloodboil Sorcerer

When this creature enters, you take the initiative.
Crown of Madness — {1}{R}, Sacrifice an artifact or creature: Goad target creature. (Until your next turn, that creature attacks each combat if able and attacks a player other than you if able.)

Commander Legends: Battle for Baldur's Gate

Whenever Bloodboil Sorcerer enters the battlefield, you take the initiative.
Crown of Madness — {1}{R}, Sacrifice an artifact or creature: Goad target creature. (Until your next turn, that creature attacks each combat if able and attacks a player other than you if able.)

A player who currently has the initiative may take the initiative again. This causes that player to venture into Undercity again, but does not cause them to have multiple initiative designations.

If the player with the initiative leaves the game, the active player takes the initiative at the same time that player leaves the game. If the active player is leaving the game or if there is no active player, the next player in turn order takes the initiative.

If you aren’t in a dungeon when instructed to venture into Undercity, you will put Undercity into the command zone and move your venture marker to Secret Entrance (the first room).

If you’re already in a dungeon when instructed to venture into Undercity, you move to the next room of that dungeon. If you are already in the last room, you will complete that dungeon and start Undercity. This is true whether you’re already in Undercity or any other dungeon.

In a Two-Headed Giant game, if both players on a team deal combat damage to the player that has the initiative at the same time, the player with the initiative will choose the order of the triggered abilities. Then, as those abilities resolve, one team member takes the initiative (and ventures into Undercity) and then the other team member does the same. The last player to take the initiative keeps it until the initiative changes again.

Only one player can have the initiative at a time. As one player takes the initiative, any other player that had the initiative ceases to have it.

Similarly, when instructed to venture into Undercity, you can’t start a dungeon that isn’t Undercity.

The initiative is a designation a player can have. A player with the initiative designation is said to “have the initiative.” The initiative carries two inherent rules. First, whenever a player takes the initiative, and at the beginning of the upkeep of the player with the initiative, that player ventures into Undercity. Second, whenever one or more creatures a player controls deal combat damage to the player who has the initiative, the first player takes the initiative. Also, some abilities will refer to having the initiative and provide other benefits.

There is no initiative in a game until an effect instructs a player to take the initiative. Once a player is instructed to do this, they have the initiative until another player takes the initiative.

You cannot venture into Undercity unless instructed to do so, either because you have the initiative at the beginning of your upkeep or because you take the initiative. Notably, if you aren’t in a dungeon and an effect instructs you to venture into the dungeon (not venture into Undercity), you can’t start Undercity.

Undercity // The Initiative

You can't enter this dungeon unless you "venture into Undercity."
Secret Entrance — Search your library for a basic land card, reveal it, put it into your hand, then shuffle. (Leads to: Forge, Lost Well)
Forge — Put two +1/+1 counters on target creature. (Leads to: Trap!, Arena)
Lost Well — Scry 2. (Leads to: Arena, Stash)
Trap! — Target player loses 5 life. (Leads to: Archives)
Arena — Goad target creature. (Leads to: Archives, Catacombs)
Stash — Create a Treasure token. (Leads to: Catacombs)
Archives — Draw a card. (Leads to: Throne of the Dead Three)
Catacombs — Create a 4/1 black Skeleton creature token with menace. (Leads to: Throne of the Dead Three)
Throne of the Dead Three — Reveal the top ten cards of your library. Put a creature card from among them onto the battlefield with three +1/+1 counters on it. It gains hexproof until your next turn. Then shuffle.