Rampage Raptor

Electrify (When this creature enters the battlefield, you may put two -1/-1 counters on this creature. If you do it deals 3 damage to any target.)
Survival (Whenever damage has been dealt to this creature, put a +1/+1 counter on it.)
When Rampage Raptor has at least one -1/-1 counter on it, it gains haste.
When Rampage Raptor has at least one +1/+1 counter on it, it gains trample.