Gray Merchant of Asphodel is the finisher
You can disguise it and flip it to get the token generation started, or hard cast it for cheaper
Whether that's fueling WildfireWildfire decks in Urza's Saga Standard that would leave the whole table without lands while you sat there and fiddled with your Grim MonolithGrim Monolith, or putting a smile on the face of cEDH players after the bans as they slowly realize that not only can these Keys untap Mana VaultMana Vaults and Basalt MonolithBasalt Monoliths, they can also target The One RingThe One Ring, suffice it to say there's no lack of targets
As a big cheap guy he has no evasion or card advantage and is one of the easiest threats to kill in the whole cube
While this is certainly an apt description for this substantial mana cost, its also more than fitting for the abilities
Snapdax seems to have some synergy in an infect deck since its direct damage puts permanent -1/-1 counters on creatures it cant kill, but I wouldnt bet the house on a win with it