Skithiryx, the Blight Dragon

Legendary Creature — Phyrexian Dragon Skeleton

Flying Infect (This creature deals damage to creatures in the form of -1/-1 counters and to players in the form of poison counters.) : Skithiryx gains haste until end of turn. : Regenerate Skithiryx.

It's a rare, beautiful thing to be both protector and protected.