Contagion Engine [Scars of Mirrodin] Modern Masters 2015 Your opponents can't block with

Your opponents can't block with creatures with even mana values

The purpose of any moat is to impede attack

Set: Friday Night Magic 2000 Type: Creature — Elf Druid Rarity: Rare Cost: {G} {T}: Add {G}

when the new leaves open from their ember-buds in a race of leaping flames

You may repeat this process any number of times

Contagion Engine [Scars of Mirrodin] Modern Masters 2015 Your opponents can't block withSet: Scars of Mirrodin Type: Artifact Rarity: Rare Cost: {6} When Contagion Engine enters the battlefield, put a 1 1 counter on each creature target player controls. {4}, {T}: Proliferate, then proliferate again. (Choose any number of permanents and or players, then give each another counter of each kind already there. Then do it again.)