Spells can't be countered. As long as it's your turn, each instant and sorcery card in your graveyard has flashback. The flashback cost is equal to that card's mana cost.

Trample Whenever you cast an instant or sorcery spell, put a +1/+1 counter on Electrostatic Infantry.

Whenever you cast a noncreature spell, Kessig Flamebreather deals 1 damage to each opponent.

Mercurial Spelldancer can't be blocked. Whenever you cast a noncreature spell, put an oil counter on Mercurial Spelldancer. Whenever Mercurial Spelldancer deals combat damage to a player, you may remove two oil counters from it. If you do, when you cast your next instant or sorcery spell this turn, copy that spell. You may choose new targets for the copy.

Defender {T}: Thermo-Alchemist deals 1 damage to each opponent. Whenever you cast an instant or sorcery spell, untap Thermo-Alchemist.

Surveil 1. (Look at the top card of your library. You may put it into your graveyard.) Draw a card.

Flame Discharge deals X damage to target creature or planeswalker. If you controlled a modified creature as you cast this spell, it deals X plus 2 damage instead. (Equipment, Auras you control, and counters are modifications.)

When you cast your next instant or sorcery spell this turn, copy that spell. You may choose new targets for the copy. Flashback {1}{U}{R} (You may cast this card from your graveyard for its flashback cost. Then exile it.)

Hexgold Slash deals 2 damage to target creature. If that creature has toxic, Hexgold Slash deals 4 damage to that creature instead.

Lightning Strike deals 3 damage to any target.

Target creature you control gets +X/+0 and gains first strike and trample until end of turn.

Play with Fire deals 2 damage to any target. If a player is dealt damage this way, scry 1. (Look at the top card of your library. You may put that card on the bottom of your library.)

Target creature gets +1/+0 and gains first strike until end of turn. Scry 1.

Kicker {1}{R} (You may pay an additional {1}{R} as you cast this spell.) Target creature gets -1/-0 until end of turn. If this spell was kicked, that creature blocks this turn if able. Draw a card.

({T}: Add {U}.)

When Maestros Theater enters the battlefield, sacrifice it. When you do, search your library for a basic Island, Swamp, or Mountain card, put it onto the battlefield tapped, then shuffle and you gain 1 life.

({T}: Add {U} or {R}.) Molten Tributary enters the battlefield tapped.

({T}: Add {R}.)

Swiftwater Cliffs enters the battlefield tapped. When Swiftwater Cliffs enters the battlefield, you gain 1 life. {T}: Add {U} or {R}.

Choose one — • Abrade deals 3 damage to target creature. • Destroy target artifact.

Look at the top four cards of your library. You may reveal an instant or sorcery card from among them and put it into your hand. Put the rest on the bottom of your library in a random order. Flashback {3}{U}{R} (You may cast this card from your graveyard for its flashback cost. Then exile it.)

Target creature gets +1/+0 and gains first strike until end of turn. Scry 1. (Look at the top card of your library. You may put that card on the bottom.)

Surveil 2. (Look at the top two cards of your library, then put any number of them into your graveyard and the rest on top of your library in any order.) Draw a card.

If you would draw a card, exile the top two cards of your library instead. You may play those cards this turn.

Flash At the beginning of your upkeep, put an oil counter on Mindsplice Apparatus. Instant and sorcery spells you cast cost {1} less to cast for each oil counter on Mindsplice Apparatus.

Until end of turn, target creature becomes a blue Serpent with base power and toughness 5/5.

Shock deals 2 damage to any target.

Light Up the Night deals X damage to any target. It deals X plus 1 damage instead if that target is a creature or planeswalker. Flashback—{3}{R}, Remove X loyalty counters from among planeswalkers you control. If you cast this spell this way, X can't be 0. (You may cast this card from your graveyard for its flashback cost. Then exile it.)