Arcane Barrier 1 (If you would be dealt arcane damage, you may pay {r} to prevent 1 of that damage.)
Spellvoid 1 (If you would be dealt arcane damage, you may destroy this to prevent 1 of that damage.)
At the beginning of your action phase, destroy this.
When this leaves the arena, deal 1 arcane damage to any target. If damage is dealt this way, amp 1. (The next time you would deal arcane damage this turn, instead deal that much plus 1.)