controlling instants and such pt 2

Enchant creature you control Enchanted creature is a Flagbearer. 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.

Islandwalk (This creature can't be blocked as long as defending player controls an Island.) : Target Merfolk you control gains protection from the color of your choice until end of turn.