The first offers some rummaging via blood tokens (and Hazel does care about any kind of token, so these work there) and when you sacrifice those or another artifact, this gets a +1/+1 counter and you gain 1 life
Pinnacle Monk / Mystic Peak You could make the case that Pinnacle Monk belongs in nearly every mono-red deck, plus many multicolor decks featuring red
Mono-Color Guilds Shards and Wedges Four Color Five-Color Partners The Do-Over Project The Do-Over Project is the next step after the Chromaticbuilding a deck with each of the same Commanders, but not repeating any cards save for basic lands (props to Abe Sargents Next 99 idea)
For example, if a player would create 30 Treasure tokens while their opponents control three Halving Seasons, they would halve 30 to 15, halve 15 to 7, and then halve 7 to 3, and end up creating three Treasure tokens
May you dodge all the Solemnitys and Leeches out there
If you have a creature that is unblockable, you can rack up poison counters quickly