Nostramo, Soulless

Menace
{x}{b}{u}, {t}: Up to x target creatures receive damage equal to Nostramo, Soulless' power. This ability cannot target more than 4 creatures.

Soultrap -Whenever a nonartifact creature is destroyed by Nostramo, Soulless', create a soulgem token. (It's an artifact with "{t}, Sacrifice this artifact: Add one mana of any color. This mana can only be spent on artifact spells and abilities".)