Yawgmoth Demon is underpowered even if you build around him, but Necromancers Stockpile is great in Commander if you want to dump a lot of zombies into your graveyard
[c]Savage Beating[/c] (Double Strike Red Instant) With [c]Savage Beating[/c]s first option you are effectively guaranteed to win this round of combat by giving all your creatures double strike
8 Quickbeam, Upstart Ent One of the lesser-known Ents from Tolkiens grand epic, Quickbeams unusual (for his type, at least) propensity for speed lets you branch out into a different Treefolk playstyle than usual
If another effect modifies how much damage your source would deal, including preventing some of it, the player being dealt damage or the controller of the permanent being dealt damage chooses an order in which to apply those effects
Also, if youre more interested in a more efficient way of winning, you can just add in Peer into the Abyss, which has a player draw half the cards in their library and lose half their life in one go, which is sure to kill them off