Zegana, Utopian Speaker

two generic mana one green mana one blue mana Legendary Creature — Merfolk WizardPower and toughness4/4

When Zegana enters, if you control another creature with a +1/+1 counter on it, draw a card.

four generic mana one green mana one blue mana : Adapt 4. (If this creature has no +1/+1 counters on it, put four +1/+1 counters on it.)

Each creature you control with a +1/+1 counter on it has trample.

Showing Ravnica Allegiance#214

Price

0.31 $

Foil 0.75 $

25 printings · up to 0.33 $

Daily estimate from Scryfall, not a shop quote.

2019-01-25
You can always activate an ability that will cause a creature to adapt. As that ability resolves, if the creature has a +1/+1 counter on it for any reason, you simply won't put any +1/+1 counters on it.
2019-01-25
If a creature somehow loses all of its +1/+1 counters, it can adapt again and get more +1/+1 counters.