Well, as they say informally
So for 4 Don, we're playing a blocker, and 2 Characters
What Resolution Should You Use for MTG Arena
Creatures (8) Planeswalkers (2) Lands (22) Spells (28) It sounds funny, but Hymn to Tourach really is the black Mana Drain
While I don't see this being the most expensive Crystal price-wise (that honor goes to The Earth CrystalThe Earth Crystal), I can certainly see this being one of the most widely adopted across multiple archetypes
P/T Number 48 Language English Legal Formats Commander, Legacy, Vintage Not Legal Formats Alchemy, Brawl, Competitive Brawl, Historic, Modern, Pauper, Pioneer, Standard, Timeless Rulings (6/16/2023) If you somehow control two Bilbo, Birthday Celebrants and you would gain life, you gain that much life plus 2