Whenever you put a counter on a creature you control, draw a card. This ability triggers only once each turn.
Illustrated by Marija Tiurina · Teenage Mutant Ninja Turtles · #200
There are no rulings for Mikey & Leo, Chaos & Order.
Whenever a Spider you control enters, draw a card. This ability triggers only once each turn.
Whenever you scry, put a +1/+1 counter on this creature. This ability triggers only once each turn.
Whenever one or more artifacts you control enter, put two +1/+1 counters on this creature. This ability triggers only once each turn.
Whenever one or more enchantments you control enter, draw a card. This ability triggers only once each turn.
Vigilance
Whenever one or more +1/+1 counters are put on this creature, draw a card. This ability triggers only once each turn.
Whenever one or more +1/+1 counters are put on this creature, put a +1/+1 counter on each other creature you control. This ability triggers only once each turn.
Whenever a +1/+1 counter is put on a creature you control, seek a creature card. That card perpetually gets +1/+1. This ability triggers only once each turn.