mtg play test cards Do-Over [Mystery Booster Playtest Cards] Whenever an opponent pays a tax from a spell or permanent you control Plain Walker - Mystery Booster

Its a creature deck at heart and can easily run over tables with a wide board full of 5/5 creatures with flying, haste, first strike, vigilance, unblockable, and whatever other keywords you can jam in

It is a bit of a bummer -- albeit a flavrful bummer -- that it goes away if your opponent does 4 or more damage to you -- but it will be surprisingly hard for your opponent to find a way to do that, since their creatures will be significantly less potent attackers, something that is even more of a problem if you have blockers

A planeswalker is dealt excess damage if it's dealt damage greater than its current loyalty

Dinosaurs on a Spaceship Dinosaurs on a Spaceship works well in both a dinosaur deck and a suspend deck