Psychic Overload is a uncommon Enchantment — Aura card from Darksteel (DST), collector number 28. Current market price: $0.10 (foil $0.74), TCGplayer market prices via Scryfall.
Enchant permanent When this Aura enters, tap enchanted permanent. Enchanted permanent doesn't untap during its controller's untap step. Enchanted permanent has "Discard two artifact cards: Untap this permanent."