Gliscor,Soaring Scorpion

Flying {I}Poison Heal- If this creature gains one or more -1/-1 counters, gain that many +1/+1 counters times 2 {I}Poison Fang- This does damage to creatures in the form of -1/-1 counters {I}Earthquake- If a land enters under your control, all creatures gain a -1/-1 counter