Its the best way to get payoffs for landfall triggers
Players have already caught on to Anzrag, the Quake Mole as a great option here, enabling a string of combat steps in the right boardstate
Blast from the Past (Green-White-Blue) Timey-Wimey (Blue-Red-White) Paradox Power (Green-Blue-Red) Masters of Evil (Blue-Black-Red) You can browse the cards in these decks with the Magic: The Gathering Doctor Who Card Image Gallery, including their showcase treatments available in Collector Boosters
Creature Removal: Okay, all Limited decks like creature removal
When a mutated creature with undying dies, all the creatures in the pile come back separately and they all get +1/+1 counters
You can then also spend either black and tap it to either exile an instant or sorcery to make your opponents lose two life, or green and tap it to exile a creature card from a graveyard to gain two life