While on first look, MTG Assassins Creed delivers sci-fi elements, it does include some unlikely creatures that are a little closer to home
Invasion of Kaladesh C-Tier: Two mana to make a 1/1 Thopter is about one mana too much, and while the backside is a potentially powerful Vehicle, you really need to be a heavy artifact deck to take advantage of it
The maximized version of Scout for Survivors that brings back three 1-drops is ridiculous, but it should be sufficient to fire this off on a single 2-drop or 3-drop, too
Thats free ramp and mana fixing for you
In order for the humans fighting it to have a chance, there needs to be some Achilles's heel of the monsters
If we're looking to only hit opposing threats, Bonfire of the Damned, Flame Wave, Street Spasm, and Immolating Gyre keep your army safe from the blast waves