Carassa, Mentor of the Feeble

Hexproof
Other wizards you control get +1/+1.
Whenever a creature with power or toughness 2
or less enters the battlefield under your control,
put a +1/+1 counter on that creature.
{3}{u}: Create a 1/1 blue Wizard creature token
with hexproof. Activate this ability only once
each turn.