Even its death trigger is quite potent, but I very much doubt youll be rushing to sacrifice the 8/8 trampler the moment it hits play
The amount of times someone wins off casting a value underworld breach is insane
Rashmis ability is really powerful, letting you cast nonland cards off the top of your library for free when you cast your first spell each turn if its mana value is less than the card being cast
Urza, Lord High Artificer Urza is a one-card engine who turns every artifact you control into a Mox Sapphire
Bello, Bard of the Brambles is key to this strategy, as he turns your non-equipment and non-aura artifacts and enchantments into creatures
Boros Energy, Mardu Energy, and Jeskai Energy all rose as some of the new format's best decks, with each playing somewhat long and grindy games