The back half of this battle, Zilortha, Apex of Ikoria, makes itself and the creature you tutored for (and all of your other non-humans!) effectively unblockable
Binding the Old Gods While it might not be as flashy and instantly impactful as some of the other options here, Binding the Old Gods is an exceptional value pick
There are plenty of options for Mana rocks, and in the 3 Mana Value (formerly known as Converted Mana Cost) category you have fan-favourites Commanders Sphere, Chromatic Lantern, and Wayfarers Bauble (3 to cast and activate)
It doesn't matter what amazing haymaker cards are in your deck if you aren't able to actually draw them
You could maybe build some weird sacrifice deck where you loop them, but not that interested
You can find full details in our guide to MTG deck archetypes - but here's a short summary of the six types and how they play: Aggro - Win fast with aggressive damage, mostly using creatures