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.

Lifelink When this creature dies, draw a card.

Enchant creature Enchanted creature can't attack or block.

Counter target instant spell.

Counter target noncreature spell unless its controller pays {2}.

This land enters tapped. {T}: Add {W} or {U}.

{T}: Add {C}. {2}, {T}: Target creature gets +X/+X until end of turn, where X is the number of Gates you control. Activate only as a sorcery.

This land enters tapped. As this land enters, choose a color other than black. {T}: Add {B} or one mana of the chosen color.

This land enters tapped. As this land enters, choose a color other than red. {T}: Add {R} or one mana of the chosen color.

{T}: Add {C}. {1}, {T}: Add one mana of any color. {1}, {T}, Tap an untapped Gate you control: Create a Treasure token. (It's an artifact with "{T}, Sacrifice this token: Add one mana of any color.")

({T}: Add {U}.)

({T}: Add {W}.)