Card advantage and Proliferate is always an excellent combination, and Ezuri brings both together in a single Commander
When many people were having doubts about the authenticity of their Pokemon cards, the PokeChalet established a direct relationship with The Pokemon Company to source sealed product, booster packs, booster boxes, collection boxes and playable PokemonTCG decks direct from TPCI distribution
That specialized card, either 2-color or a pip-added monocolor card, are versions of the original creature with a different set of abilities and sometimes slightly different stats
These are the free sacrifice outlets in this deck: Altar of Dementia Carrion Feeder Cartel Aristocrat Spawning Pit Viscera Seer Priest of Forgotten Gods (must tap Priest of Forgotten Gods but should probably be done at sorcery speed unless you have an instant to use with the 2 extra black mana the ability will give you) While these are probably your best targets to sacrifice a creature, there are a couple more
Vision Design had handed off lands that could be envisioned like portals that you could spend mana to transform into more powerful lands that represented the various planes
Thats why, even though Mystery Booster playtest cards say TEST CARD Not for constructed play at the bottom, they have a home in the command zone