Diebische Himmelstaucherin

Bonus {X}. X kann nicht 0 sein.
Fliegend
Wenn die Diebische Himmelstaucherin ins Spiel kommt und falls ihre Bonuskosten bezahlt wurden, übernimm die Kontrolle über ein Artefakt deiner Wahl mit umgewandelten Manakosten von X oder weniger. Falls das Artefakt eine Ausrüstung ist, lege sie an die Diebische Himmelstaucherin an.

Plongeuse céleste voleuse

Kick {X}. X ne peut pas être 0.
Vol
Quand la Plongeuse céleste voleuse arrive sur le champ de bataille, si elle a été kickée, acquérez le contrôle d'un artefact ciblé avec un coût converti de mana inférieur ou égal à X. Si cet artefact est un équipement, attachez-le à la Plongeuse céleste voleuse.

泥棒スカイダイバー

キッカー{X}。Ｘは０にできない。
飛行
泥棒スカイダイバーが戦場に出たとき、これがキッカーされていた場合、点数で見たマナ・コストがＸ以下のアーティファクト１つを対象とする。それのコントロールを得る。そのアーティファクトが装備品であれば、それを泥棒スカイダイバーにつける。

Thieving Skydiver

Kicker {X}. X can't be 0. (You may pay an additional {X} as you cast this spell.)
Flying
When Thieving Skydiver enters, if it was kicked, gain control of target artifact with mana value X or less. If that artifact is an Equipment, attach it to Thieving Skydiver.

Outlaws of Thunder Junction Commander

Kicker {X}. X can't be 0. (You may pay an additional {X} as you cast this spell.)
Flying
When Thieving Skydiver enters the battlefield, if it was kicked, gain control of target artifact with mana value X or less. If that artifact is an Equipment, attach it to Thieving Skydiver.

The Lost Caverns of Ixalan Commander

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An ability that triggers when a player casts a kicked spell resolves before the spell that caused it to trigger, but after targets have been chosen for that spell. It resolves even if that spell is countered.

If the Equipment can't be attached to Thieving Skydiver, most likely because Thieving Skydiver has left the battlefield before its triggered ability resolves, the Equipment remains attached to whatever it's currently attached to or remains unattached if attached to nothing.

If you copy a kicked spell, the copy is also kicked. If a card or token enters the battlefield as a copy of a permanent that's already on the battlefield, the new permanent isn't kicked, even if the original was.

If you put a permanent with a kicker ability onto the battlefield without casting it, you can't kick it.

Kicker represents an optional additional cost that you may choose to pay as you cast the spell. A spell cast with that additional cost paid is "kicked."

Some instant or sorcery spells require alternative or additional targets if they're kicked. You ignore these targeting requirements if those spells aren't kicked, and you can't kick those spells unless you can choose the appropriate targets. On the other hand, you can kick a permanent spell even if you won't be able to choose targets for an enters-the-battlefield ability of that permanent once the spell resolves.

The control-change effect of Thieving Skydiver lasts indefinitely. It doesn't wear off during the cleanup step, and it doesn't expire if Thieving Skydiver leaves the battlefield. In a multiplayer game, it does expire if you leave the game.

Thieving Skydiver's ability can target an artifact you already control. You'll attach it to Thieving Skydiver if it's an Equipment.

To determine a spell's total cost, start with the mana cost (or an alternative cost if another card's effect allows you to pay one instead), add any cost increases (such as kicker), then apply any cost reductions. The mana value of the spell is determined only by its mana cost, no matter what the total cost to cast the spell was.