Simic Signet [Commander 2015] SPA Guardabosque de las copas {T}: Add {B} for each

{T}: Add {B} for each black creature card in your graveyard

Set: Seventh Edition Type: Creature — Goblin Warrior Common Cost: {1}{R} Goblin Raider can't block

Set: Betrayers of Kamigawa Type: Creature — Spirit Common Cost: {3}{B}{B} Whenever you cast a Spirit or Arcane spell

Set: Odyssey Type: Creature — Hound Common Cost: {1}{B} Whenever Filthy Cur is dealt damage

That might be better suited to your intellect

Simic Signet [Commander 2015] SPA Guardabosque de las copas {T}: Add {B} for eachSet: Commander 2015 Type: Artifact Common Cost: {2} {1}, {T}: Add {G}{U}. For the Simic Combine, its sigil serves not as an emblem of honor but as a trademark. Its familiar image on any biological commodity attests to superb craftsmanship, ingenious innovation, and higher cost.