Vesa, The Scalegraft

At the beginning of each endstep, put a +1/+1
counter on Vesa, The Scalegraft for each +1/+1 counter you put on the creatures you control
this turn, then if four or more counters were put
on it this way, Remove them and transform it.
{1}{g}{u} Adapt 2 (If this creature has no +1/+1
counters on it, put two +1/+1 counters on it)