Ellie and Alan, Paleontologists is one of my favorite cards with discover because it has a repeatable effect that can be used multiple times a game and even on the same turn if you manage to untap it and have enough creatures in the graveyard
At just 1GW, Arahbo, Roar of the Worlds ability to give an attacking +X/+X, where X is its power, can quickly make your creatures a game-ending threat that are hard to stop without removal thanks to that lucky cat also getting trample
Cathartic Pyre 2 Looks good but is actually poor
Combo with Nylea, God of the Hunt for serious beatings
Revolt Destroy that creature if it has converted mana cost 4 or less instead if a permanent you controlled left the battlefield this turn
For example, if a Prodigal Sorcerer becomes equipped with a Gorgon's Head (an equipment that provides the equipped creature with deathtouch), then the Sorcerer's ability to deal damage to a creature by tapping would also carry the deathtouch ability, destroying any creature the Sorcerer deals damage to