Thiad, the Vast Harmony

Flying, vigilance
Whenever a nontoken creature you control with
power 2 or less enters the battlefield, create X
1/1 white Human creature tokens, where X is
half the amount of creatures you control,
rounded down.
{3}{w}: Creatures you control get +1/+1 or +0/+2
until end of turn. Activate this ability
only once per turn.