mtg squall card Graded Magic the Gathering Whenever one or more creatures attack one of your opponents Squall, SeeD Mercenary (Borderless) -

What competitive formats is Conspiracy Theorist played in

This is a very powerful card capable of some filthy things, and it was good enough to be banned in Pauper Commander

Artifact Mutation Cindervines Cramped Bunker Decimate Destructive Revelry Deus of Calamity Dire-Strain Rampage Frenzied Tilling Hull Breach Klauth's Will Kogla and Yidaro Migloz, Maze Crusher Polis Crusher Pure // Simple Ravager Wurm Rhino's Rampage Rock Basilisk Sunder Shaman Vithian Renegades Voracious Cobra Waking the Trolls Wreak Havoc Wreck and Rebuild

Any non-angel commander can use this Valkyrie's Call to reduce how often you pay commander tax