Sleight of Mind [Beta Edition] Human Shapeshifter Assassin you may tap X untapped

you may tap X untapped battles you control (so they're oriented like a regular Magic card)

Reverse Type: Sorcery — Human Warlock // Sorcery As an additional cost to cast this spell

When Chillbringer enters the battlefield

The ruins of the town were a notable upgrade from the wolves' forest den

Exterminate

Sleight of Mind [Beta Edition] Human Shapeshifter Assassin you may tap X untappedSet: Beta Edition Type: Instant Rarity: Rare Cost: {U} Change the text of target spell or permanent by replacing all instances of one color word with another. (For example, you may change "target black spell" to "target blue spell." This effect lasts indefinitely.)