Mindseeker Oculus is a common Creature — Homunculus card from Reality Fracture (FRA), collector number 33. Current market price: $0.13 (foil $0.21), TCGplayer market prices via Scryfall.
When this creature enters, empower Jace 4. (Put four loyalty counters on a Jace token you control. If you don't control one, first create a blue Jace planeswalker token with "[−1]: Surveil 1" and "[−3]: Draw a card.")