Mono-fire witch with a drop of air in collection…

Cost tops out at 5, but only play 4 until betrayal, asmodeus, or phoenix is drawn. After 4 mana is placed, use witch ability to start draining life. Ruby core placed early allows to drop to only play 3 sites (4 if you draw a 5 cost card above). Ideally, save zap & betrayal for dealing the DD blow.

Synergies:

If you have to play betrayal early and have a previously played toolbox along with mix ignus in hand, you can detonate the enemy possessed. Also works with infiltrate (or a sneaky extra explosion for ignite or lance tokens).

Another toolbox fetch is Firebolts to use against your own Phoenix to give it a +3power boost.

Watchouts:

Askelon Phoenix: Only a few cards in this mono fire deck can kill it. Also, beware of mesmerism with your own phoenix.

Pebbled Paths: salt the earth or Asmodeus have to target this site since it can disrupt the speed value.

Water; slow defensive decks with site destruction need to be closed out early

Evolution notes:

Cerberus was who Morgana replaced. Cerberus was a solid stand in (used for DD protection) but generally too passive for this deck.

Noxious corpses were included at one point and can be swapped back in for scorpions if experimenting with Rasputin (barging barghest & ignite as evil others). While fun to play, Rasputin engine is usually too slow for this deck.

Bellatrix (Witch)

@drrickso