I like that the first activated ability doesn't require tapping, and both abilities are instant speed
For just one red mana, you can kill a tiny leader, deal the last 3 damage needed to take an opponent out of the game, or finish off a pesky planeswalker or battle sitting on board
Flexible "Choose a creature type" lands are easy includes, choosing whatever non-changeling creature type that you have the most of in your hand at the time that you play them
Improvisation Capstone - $13-26 In some ways, it's quite surprising that this new Paradigm spell didn't make its way into the Commander deck from the start, but given that we've already seen its impact in Standard, it could really be a game-changer in Commander
Green relies on fight effects and artifact or enchantment removal rather than direct kill spells.
Providing a counterspell, removal, bodies, card draw, and life gain all at once, this spell really does it all