Fallen Angel

Flying
Sacrifice a creature: This creature gets +2/+1 until end of turn.

Fatal Blow

Destroy target creature that was dealt damage this turn. It can't be regenerated.

Fear

Enchant creature (Target a creature as you cast this. This card enters attached to that creature.)
Enchanted creature has fear. (It can't be blocked except by artifact creatures and/or black creatures.)

Crusade

Feast of the Unicorn

Enchant creature
Enchanted creature gets +4/+0.

Urborg Panther

Breathstealer

Spirit of the Night

Feral Shadow

Forbidden Crypt

If you would draw a card, return a card from your graveyard to your hand instead. If you can't, you lose the game.
If a card would be put into your graveyard from anywhere, exile that card instead.

Gravebane Zombie

If this creature would die, put it on top of its owner's library instead.

Gravedigger

When this creature enters, you may return target creature card from your graveyard to your hand.

Greed

Hecatomb

When this enchantment enters, sacrifice this enchantment unless you sacrifice four creatures.
Tap an untapped Swamp you control: This enchantment deals 1 damage to any target.

Hidden Horror

When this creature enters, sacrifice it unless you discard a creature card.

Howl from Beyond

Target creature gets +X/+0 until end of turn.

Infernal Contract

Draw four cards. You lose half your life, rounded up.

Daraja Griffin

Flying
Sacrifice this creature: Destroy target black creature.

Kjeldoran Dead

When this creature enters, sacrifice a creature.
{B}: Regenerate this creature.

Classic Sixth Edition