Sometimes, you wont have enough removal spells to destroy every single one of your opponents creatures, which is why board clears come in handy
Shadowmage Infiltrator (Ext, S, Block) "Jonny Magic" (named after its creator, Magic master Jon Finkel) takes Ophidian to a different level fear
[C][C][C] Bosss Headbutt: 210 damage
You tap three mana to cast a creature
Another way to enable an aristocrats strategy is recursive creatures like Reassembling Skeleton that can return from the graveyard
Without white, you're losing a bunch of buffs that are bird or flying-specific, but with green, you can replace them with other buffs that don't really care about creature type