You're playing against a Spellslinger deck, and you cast In Garruk's WakeIn Garruk's Wake
It just gets better when you invest in flipping Sheoldred to its saga side and continue destroying creatures, before getting a Rise of the Dark Realms and flipping it back over triggering another edict effect
It can't be enchanted by or equipped with cards of that colour either, and if a creature already has an equipment or enchantment on it, and then gets protection from their colour or type, that equipment or enchantment will fall off
Takenuma, Abandoned Mire is a shoo-in for black decks, Secret Tunnel making two big rats unblockable wins games, and Spymaster's Vault fits perfectly with a commander that asks you to sacrifice three creatures and fill the graveyard
Because she can dig down four cards, and exile them, and then you can cast them for free, so you'll normally see a land and some other cards, often one that's a meaningless Lightning Helix or Absorb, and then two strong effects like a big spell or dork