Black Luster Soldier - Envoy of the Beginning [IOC-025] Ultra Rare Extreme Victory You may spend mana as

You may spend mana as though it were mana of any type to cast creature spells

open helm and closed helm)

{T}: Target creature gains flying until end of turn

Shatterskull Pass is a pretty distant second

Black Luster Soldier - Envoy of the Beginning [IOC-025] Ultra Rare Extreme Victory You may spend mana asSet: Invasion of Chaos Card type: Effect Monster Rarity: Ultra Rare Attack: 3000 Defense: 2500 This card can only be Special Summoned by removing 1 LIGHT and 1 DARK monster in your Graveyard from play. Once during each of your turns, you can select and activate 1 of the following effects: Remove 1 monster on the field from play. If you activate this effect, this card cannot attack this turn. If this card destroyed your opponent's monster as a result