1 time(s) while playing as Yuma and Astral , in a Duel against Vector

A white card that can phase out your own creatures (Probably Etherealness or Blink or something like that) A legend with Whenever an Illusion you control dies (A longshot, but Jan Jansen out of Baldurs Gate 2) A cursed version of a previous D&D inspired Magic Card (Bag of Holding, introduced in M20, cursed version: Bag of Devouring ) A new card with the Melee mechanic (???) A card called Ride the Avalanche (Something Icewind Dale related) A card that uses Component Counters (A wizard, perhaps that uses spellcasting components) A land which can remove an artifact, creature, or planeswalker (An astral portal/storm) A brand new Enchant Player curse (???) A creature type: Beholder Skeleton (A Death Tyrant, the undead Beholder-kin) An equipment with Equip Cost 10 (???) A card with the ability Until end of turn, permanents your opponents control gain (One of the Mass spells) A card which grants some of your spells Cascade (Wild Magic) Whats your best guess for the hints

How to get it : Currently not available Basic Metallic Arena In-game asset that hasn't yet been used
Of the two half-decks, one will match the Welcome Deck box
I bet you wouldn't be so smug if you'd put two counters on your Pursuit of Knowledge only to have it Disenchanted