Error Tide deals X damage to target creature or planeswalker.
Corrupt — If you control a permanent with greater mana value than this spell, create an X/X colorless Construct artifact creature token.

Target creature gets +X/+0 and gains trample 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.

Whenever this Subroutine runs, when you next cast an instant, sorcery, or Subroutine spell this turn, copy it. You may choose new targets for the copy.

Put a +1/+1 counter on target creature. It gets +2/+0 and gains trample until 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}

As an additional cost to cast this spell, sacrifice a creature.
Fall Upon Your Blade deals damage equal to the sacrificed creature's power to any target.
Cycling {2}

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

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 Whip deals 4 damage to target creature or planeswalker.

Choose one —
• Frag deals 4 damage to target creature.
• Destroy target artifact.

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

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.

Enchant creature
Enchanted creature attacks each combat if able.
Whenever enchanted creature attacks, teach it trample.

[+1]: Up to one target creature gets +2/+0 and gains haste until end of turn.
[–1]: Add {R}. If Gericho, Ageless Wanderer entered this turn, add {R}{R} instead.
[0]: Exile Gericho and the top X cards of your library, where X is the number of loyalty counters on him. You may play cards exiled this way until the end of your next turn.

Whenever one or more creatures you control deal combat damage to an opponent, exile the top card of your library. Then you may create a 1/1 colorless Construct artifact creature token. If you don't, you may play the exiled card until end of turn.

Target creature gets +3/+1 until end of turn.
Create a tapped Treasure token.

Target creature you control deals damage equal to its power to target creature. If this spell's flashback cost was paid, it deals that much damage to target player instead.
Flashback {4}{R}

As an additional cost to cast this spell, sacrifice a creature or pay {4}.
Heedless Cruelty deals 5 damage to target creature or planeswalker.

Hell's Boon deals 3 damage to up to one target creature or planeswalker.
Damned — If you've sacrificed a permanent this turn, Hell's Boon deals 2 damage to each opponent.

This spell costs {2} less to cast as long as you've cast another instant or sorcery spell this turn.
High Voltage deals 3 damage to any target.

You may pay {R} rather than pay this spell's mana cost. Spend only mana produced by artifact sources to cast it this way.
Hired Shot deals 3 damage to any target.

Choose up to one target creature you control. You may discard a card. If you do, whenever that creature deals combat damage to a player this turn, draw a card.
Draw a card.

Exile the top card of your library. You may play that card this turn.
Flashback {R}