Overwhelming Surge Most of an Abrade that you get to take both parts of
Rhoda, Geist Avenger + Timin, Youthful Geist I applaud Wizards for expanding the design space around tapper effects in blue and white, but they're often just not strong enough to justify an entire deck themed around them
Izzet spellslingers are a dime a dozen, and while the payoff here is Roothas ability to turn those into big Elemental creatures, this means the early game features relatively minor gains
This already existed as the heavily played four mana to drop and four to use and colorless Quicksilver Amulet
Tucking away even the largest threats buys multiple turns and sidesteps death triggers entirely, which is invaluable when answers are limited
The Chain Veil does a lot of heavy lifting here, since you really want to be able to add three +1/+1 counters to Boo and sacrifice him the same turn to draw four cards