Mergo Infant Great One

Mindbreak, Defender. Mergo gets +0/+1 per Insight counter. You cannot be attacked. Creatures protecting Mergo get +1/+1, or +2/+2 if they are a Great One until end of turn. If in the graveyard, exile it. You may cast it for {1} more per previous exile. It enters with X Insight, where X is the number of extra {1} paid.

{t}: Target opponent mills X cards. A creature they control that didn’t attack Mergo gains X Madness. X is
the number of Insight counters on Mergo, plus one. If an opponent has no car