Nettling Imp [Alpha Edition] San Diego Comic-Con 2017 was a Taoist master and

was a Taoist master and tutored his soldiers in those arts

Fire of Kaladesh

and you may cast the copy without paying its mana cost

Set: Amonkhet Invocations Type: Enchantment Rarity: Mythic Cost: {2}{R} {3}{R}{R}: Untap all creatures you control

Nettling Imp [Alpha Edition] San Diego Comic-Con 2017 was a Taoist master andSet: Alpha Edition Type: Creature Imp Rarity: Uncommon Cost: {2}{B} {T}: Choose target non Wall creature the active player has controlled continuously since the beginning of the turn. That creature attacks this turn if able. Destroy it at the beginning of the next end step if it didn't attack this turn. Activate only during an opponent's turn, before attackers are declared.