Behemoth of Vault 0 (PIP 655)

Artifact Creature — Robot • Mana cost: {6} • Fallout • Uncommon

Trample
When this creature enters, you get {E}{E}{E}{E} (four energy counters).
When this creature dies, you may pay an amount of {E} equal to target nonland permanent's mana value. When you do, destroy that permanent.

Illustrated by Eddie Mendoza.