Allie, Sentinel of Throwables

Vigilance, First Strike
When Allie, Sentinel of Throwables or another
dog enters the battlefield under your control put
a ball counter on target creature.
Creatures with ball counters must block Allie, Sentinel of Throwables if able.
When a creature with a ball counter on it dies,
put a +1/+1 counter on Allie, Sentinel of
Throwables.