Leave Them Hanging

Suspense (This enters the arena with 2 suspense counters. At the start of your turn, remove a suspense counter from it. When it has none, destroy it.)
When this enters the arena, intimidate target hero. (They banish a random card from their hand face-down. At the beginning of the end phase, return it to their hand.)
When this leaves the arena, your next attack this turn gets +4{p}.