I think it's bad taste to add a beneficial combat damage trigger to it
Monstrous Rage is a one mana combat trick that's seen loads of play in mono red and Gruul decks in multiple MTG formats: Standard, Pioneer, and even Modern
Necrogoyf I knew Necrogoyf was going on this list by just reading the name
Yidris, Maelstrom Wielder gives cascade to all the spells you play each turn after hes dealt combat damage to your opponent, which at some point will inevitably end up in a storm of random spells to enter the battlefield all in one turn and cause a huge mess
MtG ARTIST PROOF CUSTOM SKETCH CARDS - TORALF/TORALF'S HAMMER A custom black and white pen & pencil sketch, made by the artist, on the back of an Artist Proof for the Magic: the Gathering "Toralf, God of Fury" or "Toralf's Hammer" cards from the Kaldheim expansion (2020)
Affinity is a keyword that means you can cast a card for less mana based on the permanents you have in play