Neo-Spacian Dark Panther [POTD-EN005] Super Rare Magic Origins Prerelease Promos you gain life equal to

you gain life equal to that creature's toughness

When that mana is spent to cast an instant or sorcery spell

if it had no -1/-1 counters on it

+1: Target artifact or creature loses all abilities and becomes a green Elk creature with base power and toughness 3/3

you can Special Summon 1 Dragon-Type monster from your hand to your side of the field

Neo-Spacian Dark Panther [POTD-EN005] Super Rare Magic Origins Prerelease Promos you gain life equal toSet: Power of the Duelist Card type: Effect Monster Rarity: Super Rare Attack: 1000 Defense: 500 Once per turn, you can select 1 face up monster on your opponent's side of the field. While this card is face up on your side of the field, until the end of this turn this card's name is treated as the selected monster''s name, and it gets the selected monster''s effect(s).