Is there a Magic The Gathering card that will copy target instant?

Answer 1

Yes:

Dual Casting 1Red (2)

Enchant creature

Enchanted creature has "Red, Tap: Copy target instant or sorcery spell you control. You may choose new targets for the copy."

Avacyn Restored (Rare)

Echo Mage 1BlueBlue (3)

Creature - Human Wizard (2/3)

Level up 1Blue (1Blue: Put a level counter on this. Level up only as a sorcery.)

LEVEL 2-3

2/4

BlueBlue, Tap: Copy target instant or sorcery spell. You may choose new targets for the copy.

LEVEL 4+

2/5

BlueBlue, Tap: Copy target instant or sorcery spell twice. You may choose new targets for the copies.

Rise of the Eldrazi (Rare)

Fork

Fork RedRed (2)

Instant

Copy target instant or sorcery spell, except that the copy is red. You may choose new targets for the copy.

Revised Edition

Increasing Vengeance RedRed (2)

Instant

Copy target instant or sorcery spell you control. If Increasing Vengeance was cast from a graveyard, copy that spell twice instead. You may choose new targets for the copies.

Flashback 3RedRed (You may cast this card from your graveyard for its flashback cost. Then exile it.)

Dark Ascension (Rare)

Izzet Guildmage Blue or RedBlue or Red (2)

Creature - Human Wizard (2/2)

(Blue or Red can be paid with either Blue or Red.)

2Blue: Copy target instant spell you control with converted mana cost 2 or less. You may choose new targets for the copy.

2Red: Copy target sorcery spell you control with converted mana cost 2 or less. You may choose new targets for the copy.

Guildpact (Uncommon)

Mirror Sheen 1Blue or RedBlue or Red (3)

Enchantment

1Blue or RedBlue or Red: Copy target instant or sorcery spell that targets you. You may choose new targets for the copy.

Eventide (Rare)

Mischievous Quanar 4Blue (5)

Creature - Beast (3/3)

3BlueBlue: Turn Mischievous Quanar face down.

Morph 1BlueBlue (You may cast this face down as a 2/2 creature for 3. Turn it face up any time for its morph cost.)

When Mischievous Quanar is turned face up, copy target instant or sorcery spell. You may choose new targets for that copy.

Scourge (Rare)

Reiterate 1RedRed (3)

Instant

Buyback 3 (You may pay an additional 3 as you cast this spell. If you do, put this card into your hand as it resolves.)

Copy target instant or sorcery spell. You may choose new targets for the copy.

Time Spiral (Rare)

Reverberate RedRed (2)

Instant

Copy target instant or sorcery spell. You may choose new targets for the copy.

Magic 2013 (Rare)

Sigil Tracer

Sigil Tracer 1BlueBlue (3)

Creature - Merfolk Wizard (2/2)

1Blue, Tap two untapped Wizards you control: Copy target instant or sorcery spell. You may choose new targets for the copy.

Morningtide (Rare)

Twincast

Twincast BlueBlue (2)

Instant

Copy target instant or sorcery spell. You may choose new targets for the copy.

Magic 2010 (Rare)

Uyo, Silent Prophet 4BlueBlue (6)

Legendary Creature - Moonfolk Wizard (4/4)

Flying

2, Return two lands you control to their owner's hand: Copy target instant or sorcery spell. You may choose new targets for the copy.