Enchant creature
Whenever enchanted creature deals combat damage to a player or planeswalker, you may sacrifice it. If you do, untap all creatures you control and after this phase, there is an additional combat phase.

Destroy target artifact or land.
Flashback {4}{R}{R}

[+1]: Crux deals 1 damage to target player or planeswalker. Put a chain counter on up to one target artifact or nonbasic land. It loses all abilities except mana abilities as long as it has a chain counter on it.
[–2]: Discard a card. When you do, Crux deals damage equal to the discarded card's mana value to up to one target creature and you draw a card.
[–6]: Exile target red instant or sorcery card from your graveyard. Add {R}{R}{R}, then you get an emblem with “You may cast copies of the exiled card.”

Exile all creatures and all cards from each player's hand. Any player may play those cards during their turn for as long as they remain exiled, and mana of any type can be spent to cast those spells.
Exile Dawn of Peace.

You may choose this spell's targets at random. If you do, it costs {2} less to cast.
Return target instant or sorcery card from your graveyard to your hand.
Flashback {6}{R}

Equipped creature gets +2/+0.
Whenever equipped creature attacks, make a pledge.
Equip {3}

Whenever you attack, put a beat counter on Double-Time Drums, then equipped creature gets +2/+1 until end of turn for each counter on Double-Time Drums.
At the beginning of your end step, if you didn't attack this turn, remove all beat counters from Double-Time Drums.
Equip {2}

Create a 4/4 red Dragon creature token with flying.
{R}, Discard Draconic Beckoning: It deals 1 damage to any target.

Create two 1/1 colorless Thopter artifact creature tokens with flying, then each Thopter you control deals 1 damage to each opponent.

Create a Solidarity token. When you do, pay for and choose any number.
+{R} — Edgeland Pledge deals 2 damage to any target.
+{U} — Tap up to three target creatures.
+{G} — Create a 1/1 red Soldier creature token. It gains haste until end of turn.

Choose one —
• Elektes's Charge deals 2 damage to each creature that's not enchanted.
• Up to two target creatures you control each get +2/+0 and gain trample until end of turn.

Whenever you amp it up, creatures you control get +1/+0 until end of turn.

Enchant creature
When Enter the Moshpit enters, create a 2/1 red Zombie creature token with menace.
Enchanted creature gets +2/+1 and has menace.

Target creature gets +X/+0 and gains trample until end of turn.
Draw a card.

Target creature gains haste until end of turn.
Draw a card.

Explosive Redemption deals 4 damage to target creature. When that creature dies this turn, return it to the battlefield under your control. It gains haste. Sacrifice it at end of turn.

Exile the top two cards of your library. You may play those cards until you next cast a spell from your hand.
Flashback {3}{R}{R}

Enchant creature you control
When Fall from Nyx enters, destroy target artifact or land.
Enchanted creature gets +2/+0.

Final Performance deals 2 damage to target creature. If a creature died this turn, instead Final Performance deals 5 damage to it, and excess damage is dealt to that creature's controller instead.

Firebolt deals 2 damage to any target.
Flashback {4}{R}

When Flags on High enters, create two 1/1 colorless Soldier creature tokens.
{1}{R}, Sacrifice Flags on High: Target creature you control gets +1/+0 and gains haste until end of turn. Activate only as a sorcery.

Flame Lash deals 4 damage to any target.

Whenever you attack, create a 1/1 colorless Soldier creature token that's tapped and attacking.

Frequency Jolt deals 5 damage to target creature, then it deals 2 damage to that creature's controller for each time you've amped it up this turn.

Target creature you control gains double strike until end of turn. It deals damage equal to its power to each of up to two other targets.