I was playing commander and played Cultivator Colossus which says:
Cultivator Colossus's power and toughness are each equal to the number of lands you control.
When Cultivator Colossus enters the battlefield, you may put a land card from your hand onto the battlefield tapped. If you do, draw a card and repeat this process.
And as a response Vanishing Verse was played and that cards says:
Exile target monocolored permanent.
The issue is that we don't know if the ability that says "when creature enters the battlefield" activates or not. Any help on this issue would be great.