Laccolith Rig is a common Enchantment — Aura card from Nemesis (NEM), collector number 88. Current market price: $0.23 (foil $2.10), TCGplayer market prices via Scryfall.
Enchant creature Whenever enchanted creature becomes blocked, you may have it deal damage equal to its power to target creature. If you do, the first creature assigns no combat damage this turn.