Mewtwo (12/18) [Sun & Moon: Detective Pikachu] XY142 Set: Ravnica Allegiance Type: Enchantment

Set: Ravnica Allegiance Type: Enchantment Rarity: Rare Cost: {3}{G} Whenever a nontoken creature enters the battlefield under your control

But do you have to be such a show-off about it

Set: Theros Beyond Death Prerelease Promos Type: Enchantment Creature — Horse Fish Rarity: Rare Cost: {2}{U} Whenever you cast your first spell during each opponent's turn

(Drawing cards is also considered as "adding a card to the hand"

Set: Fossil Unlimited Type: Lightning Rarity: Rare Retreat cost: Colorless

Mewtwo (12/18) [Sun & Moon: Detective Pikachu] XY142 Set: Ravnica Allegiance Type: EnchantmentSet: Sun & Moon: Detective Pikachu Type: Psychic Rarity: Holo Rare Retreat cost: Colorless,Colorless