Adaptive Warleader

At the beginning of your upkeep:
-If Adaptive Warleader is the only creature you control, it gets +1/+1 and gains vigilance until end of turn.
-If you control 3 or less creatures, creatures you control get +2/+2 until end of turn.
-If you control 4 or more creatures, creatures you control have unblockable until end of turn.
-If creatures you control have a combined toughness 12 or greater, creatures you control gain trample until end of turn.