Warhammer 40,000 Commander

Creature — Astartes Warrior

Menace
Ruinous Ascension — When this creature deals combat damage to a player, sacrifice it. If you do, reveal cards from the top of your library until you reveal a creature card. Put that card onto the battlefield, then shuffle the rest into your library. If that creature is a Demon, it deals damage equal to its power to each opponent.

Aspiring Champion

Creature — Demon

First strike, haste
Symphony of Pain — Whenever you cast a spell from anywhere other than your hand, this creature deals damage equal to that spell's mana value to target opponent.

Keeper of Secrets

Artifact

{T}: Add {C}.
{T}: Add {U} or {B}. This artifact deals 1 damage to you.