Fiery Confluence is a four-mana sorcery that can be used for a variety of purposes, though perhaps its best "bang for your buck," especially in Commander, is using the second made three times and dealing a total of six damage to all of your opponents at once
Cresselia ex heals every time Energy is attached to them from the Energy Zone, hence bringing Gardevoir along to keep them stacked with the stuff
Pawn shops Another option to consider is pawn shops
Each booster has 13 Modern-frame cards (including 1 rare), 2 Retro-frame cards (with 3 out of 10 packs containing a Retro-frame rare), and 1 unique token featuring Limited Edition Alpha artwork
Eldrazi are not going to get the same kind of inevitable drip feed of new playables over time being a flavour thing rather than a fundamental part of the game
Whenever a player casts a spell, if no mana was spent to cast that spell, this enchantment deals 5 damage to that player