While choosing targets as part of casting a spell or activating an ability, your opponents must choose at least one Flagbearer if able
Turn one, draw a card, play nothing, discard a card in the cleanup step, throw Primeval Spawn into the graveyard, turn two basic swamp, cast Reanimate targeting Primeval Spawn is totally something you I would try do in a game of EDH if the restriction wasnt present
Donquixote Doflamingo OP09-031 Character Green 5 Cost 6000 Power Special +1000 Counter [Blocker] (After your opponent declares an attack, you may rest this card to make it the new target of the attack.) [End of Your Turn] If you have 2 or more rested Characters, set this Character as active
Sorcery Color tag templates(None) Cinder Storm Cinder Storm deals 7 damage to any target
This versatility is important, as March of Swirling Mist can either protect your creatures or phase out your opponent's, which is crucial when you're being attacked or trying to bypass a difficult blocker