Giving little thought to their own defense, they carried the flag that united their army.

Coalition Honor Guard

While an opponent is choosing targets as part of casting a spell they control or activating an ability they control, that player must choose at least one Flagbearer on the battlefield if able.

The List

Eternal Masters

While choosing targets as part of casting a spell or activating an ability, your opponents must choose at least one Flagbearer on the battlefield if able.

Apocalypse

If an opponent plays a spell or ability that could target a Flagbearer in play, that player chooses at least one Flagbearer as a target.

Activated abilities contain a colon. They’re generally written “[Cost]: [Effect].” Some keywords are activated abilities and will have colons in their reminder text. Triggered abilities (written with “when,” “whenever,” or “at”) don’t have to target a Flagbearer.

Any player’s Flagbearer may be targeted. For example, if each player controls a Coalition Honor Guard, Seal of Strength’s ability may target any of them.

If a spell or ability’s targets are changed, or if a copy of a spell or ability is put onto the stack and has new targets chosen, it doesn’t have to target a Flagbearer.