Haste
Drop — Whenever Avatar of the Moshpit or another creature you control enters, if the entering creature was cast and you didn't cast any creature spells during your last turn, discard your hand, then draw three cards.

Burn Rubber deals 1 damage to each creature your opponents control. Creatures your opponents control can't block this turn.

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}

Whenever you amp it up, target creature can't block this 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 gains haste until end of turn.
Draw a card.

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.

At the beginning of your end step, if a creature died this turn, exile the top card of your library. Until the end of your next turn, you may play that card.

Whenever you amp it up, Fraying Gearhead gets +1/+0 and gains first strike until end of turn.

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.

Choose one —
• Destroy target artifact.
• Target attacking creature gets +3/+3 until end of turn.

Gleaming Laser deals 4 damage to any target. You gain 4 life. If a permanent dealt damage by Gleaming Laser would die this turn, exile it instead.

{VP}{VP}{VP}: Reveal the top seven cards of your library. You may have Iconic Hologram become a copy of a legendary creature card revealed this way until end of turn. Put the revealed cards on the bottom of your library in a random order.

{3}{R}{R}, Exile Indulge the Fifth Encore from your hand: At the beginning of your next upkeep, you may cast Indulge the Fifth Encore from exile without paying its mana cost. Activate only as a sorcery.
Add {W}{U}{B}{R}{G}. Until end of turn, you don't lose this mana as steps and phases end.

Reach
{VP}{VP}{VP}: Laser Technician deals 1 damage to target player, planeswalker, or creature with flying.

Lightvein Arrow deals 3 damage to any target. Scry 1.

Exile the top three cards of your library. You may play up to two of those cards this turn.

Creatures you control get +2/+0 until end of turn. Up to one target Elemental you control gains first strike until end of turn.

[+1]: Exile the top card of your library. You may play it this turn. If that card doesn't share a name with a permanent you control or a card in your graveyard, add {R}{R}.
[–2]: Gain control of target creature until end of turn. Untap that creature. It gains haste and menace until end of turn.
[–6]: You get an emblem with “Whenever you amp it up, this emblem deals 2 damage to any target.”

Create three 1/1 red and green Elemental creature tokens.

When Photonic Cobra dies, create a 1/1 red and green Elemental creature token.

Exile the top two cards of your library. Until the end of your next turn, you may play those cards. Cards exiled this way cost {2} less to cast if they're instants, sorceries, or Elementals.

As Prodigious Hater enters, look at an opponent's hand, then choose a nonland card name.
Whenever an opponent casts a spell with the chosen name, Prodigious Hater deals 3 damage to that player.

Haste
{T}, Sacrifice Pyrote Entity: It deals 1 damage to any target.