On both MTG Online and Arena, multiplayer formats are only available in 1v1 versions
The Blood token is especially good, as burn decks can stall out with cards they can't do anything with
Reyhan, Last of the Abzan [Best +1/+1 Counter Support] Reyhan, Last of the Abzan maintains board pressure by preserving invested resources
Crimson Kobolds Crookshank Kobolds Kobold Drill Sergeant Kobold Overlord Kobold Taskmaster Kobolds of Kher Keep Minion of the Mighty Nogi, Draco-Zealot Rograkh, Son of Rohgahh Rohgahh of Kher Keep Rohgahh, Kher Keep Overlord Rosnakht, Heir of Rohgahh Taunting Kobold
Most Esika snow decks Ive seen seem to be filled with as many gods as their builders can find (especially the Kaldheim ones), with some incidental snow in the mana base and among the noncreature spells