30th Anniversary Edition

Creature — Unicorn

Pearled Unicorn

Enchantment — Aura

Enchant creature
At the beginning of the upkeep of enchanted creature's controller, this Aura deals 1 damage to that player.

Wanderlust

Deckmasters

Sorcery

Hurricane deals X damage to each creature with flying and each player.

Hurricane

Classic Sixth Edition

Creature — Goat

Mountainwalk (This creature can't be blocked as long as defending player controls a Mountain.)

Mountain Goat

Ice Age

Creature — Human Mercenary

{3}: The next time this creature would deal damage to you this turn, prevent that damage. Any player may activate this ability.

Mercenaries

Creature — Human Cleric Shaman

{T}, Sacrifice a creature: Target creature gets +2/+2 until end of turn.
{1}{U}{U}, Sacrifice a creature: Counter target creature spell.

Brine Shaman

Each player loses a third of their life, then discards a third of the cards in their hand, then sacrifices a third of the creatures they control of their choice, then sacrifices a third of the lands they control of their choice. Round up each time.

Creature — Wolverine

{R}: This creature gets +2/+0 until end of turn. Activate only during the declare blockers step, only if at least one creature is blocking this creature, and only once each turn.