Maleficents Staff seems incredibly powerful for its cost of just two ink
Next to the Charizard, the Blastoise single (#2) is the second-most coveted card
When any source deals damage to you or a permanent you control, they will lose two life unless they can pay one generic mana
The deck then curves into powerful mid- and late-game threats with devastating abilities including Anje (blood tokens, drain), Butcher (creature sacrifice), Carmen (+1/+1 counters, life gain, reanimate), Edgar, Charmed Groom (anthem), Elenda, Saint of Dusk (lifelink, hexproof, buffs), Elenda, the Dusk Rose (+1/+1 counters, creature tokens), Henrika (sacrifice/draw/transform), Necropolis Regent (+1/+1 counters), and many many more
Either way, getting this into play for only two mana offers a pretty decent return on mana investment