Tormods Crypt and Fountain of Youth found new life in Chronicles and Gauntlets of Chaos, Serpent Generator, Triassic Egg, Voodoo Doll and Jeweled Bird, also had impacts on the game
Hapatra, Vizier of Poisons with either Channeler Initiate or Deity of Scars was very good (forget having multiples or having even a single Creakwood Liege on he board)
The ideal is getting use out of your ability-laden creatures first from Odric, Lunarch Marshal, trigger Kathril, then use Soulflayer, but where's the card draw to help you get there
Toxic Deluge Toxic Deluge fits the bill of a cheaper and more flexible/effective sweeper
Now, Ill grant that maybe saying that a planeswalker is good on an empty battlefield isnt that meaningful of a statement, as most planeswalkers are good on empty battlefields, but Oko only costs three mana and Oko is green, which means its far more likely than most planeswalkers to be cast on an empty battlefield
Sanctum of All I had high hopes for the first 5-color shrine, and I think Sanctum of All really delivers