The first example we saw was Barbarian Class, which is a one-mana Red enchantment that effectively gives you advantage on your dice rolls, so you can roll two dice and then pick the higher of the two
3B: Target player discards a card
When the arrival of a new Horizons set on the MTG release schedule can create a deck archetype that uses 80% new spells, that's clearly not the case any more
Legendary Creature - Human Performer Ratadrabik of Urborg Vigilance, ward Other Zombies you control have vigilance
It's quite mathy, but he goes into a great deal of detail and explains his rationale, while not ignoring the realities of the game (there are one-mana Cycling cards, cards that fetch lands, cards that tap to add mana which aren't lands, and more.)
Use the Lotus to tap for triple black, then untap it for one mana with the Staffs first ability, draw your entire deck (thanks to Staff of Domination), cast an infinitely large Exsanguinate or Torment of Hailfire and youre done