You can use an entomb to bin something as simple as a Raven's Crime, which sets up your leaves-the-graveyard triggers on cards like Teval's Judgment or Garrison Excavator
Archangel of Thune #5 Magic 2014 Core Set Change Version Archangel of Thune Creature Angel Flying Lifelink (Damage dealt by this creature also causes you to gain that much life.) Whenever you gain life, put a +1/+1 counter on each creature you control
It either removes counters from a permanent equal to your elf count or shrinks down a creature that same way
The left edge, however, is a smooth, straight line
While the Mardu Revival Trance Commander preconstructed deck is unlikely to be quite that powerful, a lot of Commanders who may want to utilize Terra in their 99s are trying to accomplish exactly this
For the Commander (2021 Edition) rares and mythic rares, the Collector Booster has a dedicated single slot (in addition to the slot above) that will always have a non-foil extended-art version containing one of the new rare and mythic rare cards from the five Commander (2021 Edition) decks