Chains of Mephetis

You may play this from your banished zone. If you do, it enters the arena with a doom counter.
At the start of your turn, destroy this unless you remove a doom counter from it.
If a hero would draw a card during an action phase, instead they banish the top card of their deck and may play it this turn.
Blood Debt (While this is in your banished zone, at the beginning of your end phase, lose 1{g}.)