Starting the game with one
This article dives into how fight works in MTG, the best fight cards, how to build fight into a deck, and how to play against fight and win
While it certainly wasnt beating the unplayable charges in Standard, The Deck of Many Things is much more viable in Commander, where it can serve as a late-game value engine
Then this also stops life gain to slow burn your fun times and damage cannot be prevented
If you really want a less, well, dishonest place to put this Horse, I suppose its a flying lifelinker that happens to buff Unicorns, which might be worth a slot in Lathiel, the Bounteous Dawn
Genesis Chamber can lose this effect if it is tapped, which we can easily do with any creature with Waterbend