Shower of Coals deals 2 damage to each of up to three targets.
Threshold — Shower of Coals deals 4 damage to each of those permanents and/or players instead if there are seven or more cards in your graveyard.

Counter target spell.
Flashback (You may cast this card from your graveyard for its flashback cost. Then exile it.)

Trample
This creature gets +4/+4 as long as there are no cards in your graveyard.

Flying (This creature can't be blocked except by creatures with flying or reach.)
: This creature gets +0/+1 until end of turn.

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

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

Discard a card at random: This creature gains first strike and haste until end of turn.

Threshold — This creature gets +4/+4 as long as there are seven or more cards in your graveyard.

Trample
This creature enters with seven +1/+1 counters on it.
Whenever you tap a land for mana, remove a +1/+1 counter from this creature.

Flying
, Discard a card: Return this creature to its owner's hand.

Whenever a creature dies, that creature's controller sacrifices a land of their choice.

Target player sacrifices a land of their choice.
Threshold — Each player sacrifices all lands they control instead if there are seven or more cards in your graveyard.

Create a 4/4 green Beast creature token.
Flashback (You may cast this card from your graveyard for its flashback cost. Then exile it.)

Enchant creature (Target a creature as you cast this. This card enters attached to that creature.)
You control enchanted creature.

Target player mills half their library, rounded down.

Flying
, : This creature deals 2 damage to target attacking or blocking creature.

Enchant creature
At the beginning of each upkeep, put a plague counter on this Aura.
Enchanted creature gets -1/-1 for each plague counter on this Aura.
When enchanted creature leaves the battlefield, that creature's controller returns this Aura from its owner's graveyard to the battlefield.

Whenever you cast an instant or sorcery spell, you may pay . If you do, copy that spell. You may choose new targets for the copy.

Thermal Blast deals 3 damage to target creature.
Threshold — Thermal Blast deals 5 damage instead if there are seven or more cards in your graveyard.

Exile all cards from target player's graveyard other than basic land cards. For each card exiled this way, search that player's library for all cards with the same name as that card and exile them. Then that player shuffles.

Flying
Whenever this creature becomes the target of a spell or ability, sacrifice it unless you discard a land card.

, Exile a card from your graveyard: This enchantment deals 1 damage to each creature and each player.

Flying
, Discard a card: This creature gets +2/+2 until end of turn.

, Sacrifice a creature: Target creature gets -2/-2 until end of turn.
, Exile a creature card from your graveyard: Target creature gets -2/-2 until end of turn.

, Sacrifice this creature: Target player draws a card.

As an additional cost to cast this spell, choose a number between 0 and 5.
Liquid Fire deals X damage to target creature and 5 minus X damage to that creature's controller, where X is the chosen number.

Return all permanents to their owners' hands.

Enchant land
Enchanted land has ": Target player loses 3 life."

At the beginning of your upkeep, you may create a 1/1 green Squirrel creature token.
Threshold — All Squirrels get +2/+2 as long as there are seven or more cards in your graveyard.

Haste (This creature can attack and as soon as it comes under your control.)
: Kamahl deals 3 damage to any target.

Flying, vigilance
Threshold — As long as there are seven or more cards in your graveyard, this creature gets +3/+3, is black, has trample, and has "At the beginning of your upkeep, sacrifice a creature."

Morbid Hunger deals 3 damage to any target. You gain 3 life.
Flashback (You may cast this card from your graveyard for its flashback cost. Then exile it.)

, Discard a card: This creature gains fear until end of turn. (It can't be blocked except by artifact creatures and/or black creatures.)

Destroy all creatures. They can't be regenerated.
Threshold — If there are seven or more cards in your graveyard, instead destroy all creatures, then create two 1/1 white Spirit creature tokens with flying. Creatures destroyed this way can't be regenerated.

Tap an untapped Octopus you control: Tap target permanent.
: Tap all creatures without flying.

Choose any number of creatures target player controls. Choose the same number of creatures another target player controls. Those players exchange control of those creatures. (This effect lasts indefinitely.)