Shadow, +Slice (2)
Target opponent loses 3 life.
Cipher (Then you may exile this spell card encoded on a creature you control. Whenever that creature deals combat damage to a player, its controller may cast a copy of the encoded card without paying its mana cost.)
This spell can't be countered. (This includes by the ward ability.)
Target creature gets -X/-X until end of turn.
Gatherer works better in the Companion app!