If you can flicker the Yggdrasil you can do it all over again with the same creatures if they are killed
Crypt GhastCrypt Ghast, DeathgreeterDeathgreeter, ExsanguinateExsanguinate, Gray Merchant of AsphodelGray Merchant of Asphodel, and Vampiric LinkVampiric Link provide enough of a buffer to keep you jumping along (notably, Vampiric Link gains you life even if an opponent controls Kain)
A-Raiyuu, Storm's Edge Brawl Deck Upgrades We're adding more Samurai and Warriors in place of the creatures we've removed, and we're also adding a ton of flexibility and efficiency alongside those promised combat tricks
This is an odd card to evaluate, as it doesnt affect the board but also offers a pretty powerful life swing
Duress can also remove opposing Lightning Bolts and removal, and that comes in very handy against pretty much every matchup, except maybe hatebears