A Wrexial, the Risen Deep deck about stealing your opponents stuff.

Spells like Treachery, and Control Magic, which take control of opponent's creatures the old-fashioned way. Then we have cards like Sepulchural Primordial, Diluvian Primordial, and Havengul Lich that can cast cards from opponent's graveyards. Sakashima the Imposter and Dimir Doppelganger can copy creatures that are on the battlefield or in the graveyard. Knowledge Exploitation and Thada Adel, Acquisitor allow you to take things from opponent's libraries. Spelljack and Desertion let you counter spells and then cast them yourself. Mindleech Mass lets you cast cards already in an opponent's hand.

Cards like Telemin Performance and Helm of Obedience allow you to mill opponents while simultaneously taking their stuff, which has a really neat synergy with Wrexial since you can then take whatever they have. Geth, Lord of the Vault and Traumatize are powerful mill cards that can also help Wrexial, though be careful of recursion and reanimation effects.

Aside from that, we have a few colorless mana rocks and ramping artifacts, some removal and board wipes (Whelming Wave works particularly well with Wrexial out), some card draw effects, and some tutors.