Seer of the Bright Side

This creature enters with two cage counters on it. This creature can't attack or block as long as it has a cage counter on it. At the beginning of your upkeep, remove a cage counter from this creature. When the last cage counter is removed this way, destroy target creature an opponent controls.

From Magic: The Gathering.

Open the interactive version on https://mythscribe.cloud/app/tcg/cards/cms6ob5qi7jbdpb1h6higqtse.