mtg more than 60 cards Ikoria Green/blue Mutate - Card Ready to Play Deck - Fun - Magic Playing With More Than 60

Yes, Elvish Champion is an elf, which has been updated on all versions from Ninth Edition forward, and appears in the Oracle Text of all versions

(2022-10-07) If another player gains control of your graveyard, Animate Graveyard will be put its owner's graveyard

Mana Vault Description : Mana Vault is an artifact that taps for three colourless mana, but it comes into play tapped and requires paying four mana during each upkeep or untap step, or else it deals one damage to its controller

That doesnt mean that Jaxis is a bulk card (as its currently being treated)

The Enigma Jewel costs only one mana to cast, but its craft cost is and it requires four other nonland permanents with activated abilities as craft materials