Psyduck (33/149) [Black & White: Boundaries Crossed]Set: Black & White: Boundaries Crossed Type: Water Rarity: Common Retreat cost: Colorless,Colorless,Colorless

you lose 1 life and that opponent gains 1 life

Whenever Sphinx Ambassador deals combat damage to a player

Set: Sword & Shield: Rebel Clash Type: Fire Rarity: Secret Rare Retreat cost: Colorless

Set: Sun & Moon: Unbroken Bonds Type: Lightning Rarity: Ultra Rare Retreat cost: Colorless

the seed of life

Set: Core Set 2019 Prerelease Promos Type: Creature — Cat Soldier Rarity: Rare Cost: {2}{W}{W} Whenever Leonin Warleader attacks

every fear

and "this turn" and "until end of turn" effects end

All creatures get -X/-X until end of turn

where X is 1 plus the exiled creature's mana value

Set: Alpha Edition Type: Creature — Basilisk Rarity: Uncommon Cost: {3}{G}{G} Whenever Thicket Basilisk blocks or becomes blocked by a non-Wall creature

and Serpents you control can't be blocked except by Krakens