Destroy target creature. If that creature entered the battlefield this turn, scry 2.

Search your library for a card, put it into your hand, then shuffle.
Flashback—{1}{B}, Discard a card, Sacrifice a creature.

Target player discards two cards and loses 2 life. If this spell's flashback cost was paid, instead that player discards a card and loses 1 life.
Flashback {B}

Lifelink
When Weathered Blackguard enters the battlefield, you may attach target Equipment you control to it.
Wander {2}{B}

When Widowed Maiden enters the battlefield, return target creature card from your graveyard to your hand.
Spellcharge 3

When Writheling enters the battlefield, exile up to one target card in a graveyard. If you do, each opponent loses 1 life and you gain 1 life.
When Writheling leaves your graveyard, draw a card.

Flash
When Zyxthax Apex enters the battlefield, each opponent loses 3 life and you gain 3 life.
When Zyxthax Apex leaves your graveyard, each opponent loses 3 life and you gain 3 life.

Enchant creature
Enchanted creature gets +2/+0 and has “Attacking creatures you control get +1/+0.”
Wander {2}{R}

Create a tapped 2/1 red Human Warrior creature token.
Flashback {2}{R}

This spell can't be countered.
Haste
Whenever an opponent casts a spell during your turn or spends at least five mana to cast a spell, Aspirant's Bane deals 5 damage to that player.

When Audacious Roughrider enters or leaves the battlefield, exile the top card of your library. Then you may discard a card. If you do, put the exiled card into your hand. If you don't, create a Treasure token.
Wander {4}{R}{R}

Target creature you control gets +2/+0 and gains first strike until end of turn. If it's attacking, create a 1/1 white Human creature token that's tapped and attacking.

Whenever an attacking creature you control dies, Bleeding Edge Memorial deals 1 damage to defending player.
Spellcharge 4

You may cast this spell by paying {1}{R}{R} and exiling X cards with flashback from your graveyard rather than paying its mana cost.
Bring Down the Sky deals X damage to each creature and each planeswalker.

Flying, haste
When Chainbreaker's Familiar enters, exile target instant or sorcery card from your graveyard. You may cast a copy of that card until the end of your next turn.
At the beginning of combat on your turn, if you've spent at least five mana to cast spells this turn, you may return Chainbreaker's Familiar from your graveyard to your hand.

Choose one. If this spell's flashback cost was paid, instead choose three and you may choose the same mode more than once.
• Destroy target artifact.
• This spell deals 3 damage to any target.
• You may discard one or more cards. If you do, draw that many cards plus one.
Flashback {7}{R}{R}

Haste
{T}: Target creature gains haste until end of turn.
Wander {1}{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.”

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

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}

Defender
Whenever you cast an instant or sorcery spell, Dormant Slagheap loses defender until end of turn. If that spell was cast from your graveyard, put a +1/+1 counter on Dormant Slagheap.

When Elderflame Pilgrims enters the battlefield, it deals 2 damage to target player or planeswalker.
Wander {5}{R}

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

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}

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