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.)
Amp 1 (The next time you would deal arcane damage this turn, instead deal that much plus 1. This happens before prevention effects.)
If you have no cards in hand, draw a card.
Instant -- Destroy this: Until end of turn, whenever an aura permanent you control with Sigil in its name leaves the arena, amp 1. (The next time you would deal arcane damage this turn, instead deal that much plus 1.)
Battleworn (When the combat chain closes, if this defended, put a -1{d} counter on it.)