Liberator, Urza's Battlethopter

Cost: 3 Colorless

Type: Legendary Artifact Creature — Thopter

P/T: 1/2

Ability: Flash(You may cast this spell any time you could cast an instant.)
Flying(This creature can't be blocked except by creatures with flying and/or reach.)
You may cast colorless spells and artifact spells as though they had flash.
Whenever you cast a spell, if the amount of mana spent to cast that spell is greater than Liberator, Urza's Battlethopter's power, put a +1/+1 counter on Liberator.

The Brothers' War (BRO)