Entering the Zone

Entering the Zone comes into play with 1 counter
At the beginning of your upkeep, put a counter
on Entering the Zone
1 counter: Enchanted creature cannot attack
2 counters: Enchanted creature gains unblockable
and indestructible
3 counters: Enchanted creature gains +3/+3 and trample for each other creature you control, sacrifice it at the end of turn