Whenever another creature dies, or a creature card is put into a graveyard from anywhere other than the battlefield, or a creature card leaves your graveyard, Syr Konrad deals 1 damage to each opponent.
: Each player mills a card.

Menace
Whenever an opponent sacrifices a nontoken permanent or discards a permanent card, you may put that card from a graveyard onto the battlefield under your control.

Each player sacrifices two creatures.
Foretell

Read ahead (Choose a chapter and start with that many lore counters. Add one after your draw step. Skipped chapters don't trigger. Sacrifice after III.)
Target opponent reveals their hand. You choose a creature or planeswalker card from it. That player discards that card.
Search your library for a card, put that card into your hand, then shuffle. You lose 3 life.
Put target creature card from a graveyard onto the battlefield under your control.

Strange new worlds — All creatures get -X/-X until end of turn, where X is the number of differently named lands you control. If X is 6 or more, create two 2/1 red Klingon Warrior creature tokens with haste.

Flying, trample
Start your engines!
At the beginning of your end step, you draw X cards and lose X life, where X is your speed.

At end of combat, gain control of all creatures blocking this creature for as long as you control this creature.

Whenever this creature is dealt damage, you lose that much life.
Morph

: This creature deals 1 damage to each creature and each player.

Target player discards three cards.

Destroy target creature. You gain 1 life for each artifact you control.

Flying, haste
Consume Anomaly — Whenever this creature deals combat damage to a player, put target face-up card they own in exile on the bottom of their library. If you do, you gain 3 life.

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.

Targeting Relay — At the beginning of combat on your turn, choose an opponent.
Creatures attacking the last chosen player have menace.

When this creature enters, create a 1/1 black Rat creature token with "This creature can't block." Then for each Rat you control, create a Wicked Role token attached to that Rat. (If you control another Role on it, put that one into the graveyard. Enchanted creature gets +1/+1. When this Aura is put into a graveyard, each opponent loses 1 life.)

Flying
Whenever Ultron enters or attacks, create a 2/2 colorless Robot Villain artifact creature token.
Whenever another artifact is put into your graveyard from the battlefield or an artifact card is put into your graveyard from anywhere other than the battlefield, each opponent loses 1 life.

Deathtouch
When Underbridge Warlock enters, you get a one-time boon with "At the beginning of your end step, if three or more creatures died this turn, each opponent loses 5 life and you gain 5 life."
At the beginning of your end step, if you have a boon, you mill three cards, draw a card, and lose 2 life.

When this creature enters, you may sacrifice an artifact or creature. When you do, exile target creature an opponent controls.

Whenever this creature attacks, exile target creature card from your graveyard.
When this creature dies, put all cards exiled with it onto the battlefield.

(You may cast either half. That door unlocks on the battlefield. As a sorcery, you may pay the mana cost of a locked door to unlock it.)
When you unlock this door, create a 6/6 black Demon creature token with flying.

Destroy target creature.
Spell mastery — If there are two or more instant and/or sorcery cards in your graveyard, you gain 2 life.

Enchant creature
At the beginning of the upkeep of enchanted creature's controller, this Aura deals damage equal to that creature's power to that player unless they sacrifice another creature of their choice.

Flying
When this creature enters, target opponent loses 3 life and you gain 3 life.

As an additional cost to cast this spell, sacrifice any number of creatures.
Target creature gets +2/+2 until end of turn for each creature sacrificed this way.

Target opponent loses life equal to the number of creatures they control. Then destroy all creatures.

Menace
Whenever another creature dies during your turn, put a +1/+1 counter on Vogar.
When Vogar dies, draw a card for each +1/+1 counter on it.

Flying
Sacrifice three other creatures: Transform this creature.
Madness

Flying
Toxic Spores — At the beginning of your end step, if a permanent you controlled left the battlefield this turn, each opponent loses 3 life.

Inspired — Whenever this creature becomes untapped, target creature you control gains intimidate until end of turn.