Glass-Cast Heart (Extended) [Innistrad: Crimson Vow Commander] SPA Cortarraices de Lagrimaerrante you may change "black creatures

you may change "black creatures can't attack" to "blue creatures can't attack

and their blood will be my mortar

return Deal Damage from your graveyard to your hand

Lesson learned

Set: The Dark Type: Creature — Fish Common Cost: {5}{U} Giant Shark can't attack unless defending player controls an Island

Glass-Cast Heart (Extended) [Innistrad: Crimson Vow Commander] SPA Cortarraices de Lagrimaerrante you may change "black creaturesSet: Innistrad: Crimson Vow Commander Type: Artifact Rarity: Rare Cost: {2}{B} Whenever one or more Vampires you control attack, create a Blood token. {B}, {T}, Pay 1 life: Create a 1 1 white and black Vampire creature token with lifelink. {B}{B}, {T}, Sacrifice Glass Cast Heart and thirteen Blood tokens: Each opponent loses 13 life and you gain 13 life.