He can quest for two, but he can also keep the team healthy

Printings not found: Anger (CMT), Arcane Denial (CMT), Bathe in Light (CMT), Boros Guildmage (CMT), Borrowing 100,000 Arrows (CMT), Cleansing Beam (CMT), Congregate (CMT), Control Magic (CMT), Curse of Inertia (CMT), Curse of Predation (CMT), Curse of the Forsaken (CMT), Darksteel Mutation (CMT), Death by Dragons (CMT), Deceiver Exarch (CMT), Diabolic Tutor (CMT), Diviner Spirit (CMT), Dragon Whelp (CMT), Duergar Hedge-Mage (CMT), Evincar's Justice (CMT), Furnace Whelp (CMT), Gwyllion Hedge-Mage (CMT), Hada Spy Patrol (CMT), Krosan Grip (CMT), Leafdrake Roost (CMT), Leonin Bladetrap (CMT), Lightkeeper of Emeria (CMT), Mortify (CMT), Mother of Runes (CMT), Oni of Wild Places (CMT), Orim's Thunder (CMT), Orzhov Guildmage (CMT), Path to Exile (CMT), Pilgrim's Eye (CMT), Presence of Gond (CMT), Pyrohemia (CMT), Razorjaw Oni (CMT), Restore (CMT), Return to Dust (CMT), Selesnya Charm (CMT), Selesnya Guildmage (CMT), Serra Angel (CMT), Shattered Angel (CMT), Skyward Eye Prophets (CMT), Soul Snare (CMT), Stonecloaker (CMT), Sulfurous Blast (CMT), Swiftfoot Boots (CMT), Sylvan Reclamation (CMT), Syphon Flesh (CMT), Syphon Mind (CMT), Terminate (CMT), Thornwind Faeries (CMT), Thunderstaff (CMT), Vow of Duty (CMT), Vow of Lightning (CMT), Vow of Malice (CMT), Wash Out (CMT), Winged Coatl (CMT), Wonder (CMT), Wrecking Ball (CMT).

Also, while it was a parasitic mechanic in its first use, every time we bring it back, it becomes a backwards-compatible mechanic more and more
Theyre card disadvantage, at least on the first cast, but binning two spells for 1 mana is amazingly efficient, especially with graveyard-based strategies revolving around mechanics like dredge and cards like Arclight Phoenix
Seeing that you'll be casting increasingly mammoth hydras, you'll nearly always be the only player to benefit from this ability, letting each hydra you cast replace itself in your hand