Thornus, Altered King

{2}{g}{u} Alter 2 (If this creature has no +1/+1
counters on it, put 2 +1/+1 counters on it and it
becomes Altered.)

Whenever you put +1/+1 counters onto a
creature you control, gain life equal to that
creature's power.
Other Altered creatures you control have
Trample and Hexproof.