Islandwalk, swampwalk (This creature can't be blocked as long as defending player controls an Island or a Swamp.)
Whenever Wrexial deals combat damage to a player, you may cast target instant or sorcery card from that player's graveyard without paying its mana cost. If that spell would be put into a graveyard, exile it instead.
Wrexial is a UB control/theft deck that grinds the game with counterspells, removal, and card advantage while protecting a single big threat. Connect with Wrexial—often unblockable via islandwalk/swampwalk or evasion enablers—to steal and recast the best instant/sorcery from an opponent's graveyard for free. You leverage opponents' own bombs (board wipes, tutors, extra turns) against them while slowly pulling ahead on resources.
Free spell casting on connection generates massive tempo and card advantage
Built-in evasion (islandwalk/swampwalk) makes it hard to block in three-opponent pods
UB gives access to the best removal, counterspells, and card draw
Punishes graveyard-reliant and spell-heavy opponents
Six mana and combat-dependent—does nothing the turn it lands
Highly vulnerable to removal, bounce, and being chump-blocked by non-Island/Swamp players
Trigger relies on opponents having good instants/sorceries in their yards
No inherent graveyard recursion or ramp; can stall on slow draws
Ramp to deploy Wrexial earlier and hold up interaction the following turns.
Add cheap evasion and protection (Rogue's Passage, Whispersilk Cloak, Aqueous Form) plus efficient interaction to ensure Wrexial connects and survives. Tighten the mana base with fast rocks and duals, and lean into free spells (Snuff Out, Force of Negation) so you can attack while holding up answers. To push higher, include extra-combat or unblockable enablers and a compact combo finish you can also steal from opponents' graveyards.