Flensermite

Flensermite

Creature - Phyrexian Gremlin | Power/Toughness: 1 / 1 (CMC 2)
Infect (This creature deals damage to creatures in the form of -1/-1 counters and to players in the form of poison counters.)
Lifelink (Damage dealt by this creature also causes you to gain that much life.)