Kodama of the West Tree is already a counter staple, but Araa, Heart of the Spider, Uncivil Unrest, and Kami of Celebration should all be on your radar
The Slow Lands, were just that
Your choices are: Make two 1/1 red and white Soldier creature tokens with haste, and they come into play tapped and attacking
Everything from beings on the plane, oozes, and dinosaurs to the environment itself, full of erupting volcanoes, falling chunks of the moon, and even dangerous vegetation
Abaddon the Despoiler You play a lot of group slug cards that constantly drain the table, like Protection Racket, and then that lets you make everything cascade into more such stuff, which creates the kind of horrifying experience that makes Abaddon the Despoiler a Warhammer 40K flavor win