Zada

[JordanCirk]

Friend of mine is building  {Zada, Hedron Grinder}. Got any fun red instants or sorcerys that would work well with him? All suggestions welcome.

[theravenseye]

Friend of mine is building  {Zada, Hedron Grinder}. Got any fun red instants or sorcerys that would work well with him? All suggestions welcome.

{Shivan Meteor} comes to mind

[Kaylesh]

Friend of mine is building  {Zada, Hedron Grinder}. Got any fun red instants or sorcerys that would work well with him? All suggestions welcome.

{Shivan Meteor} comes to mind

Note Zadra copies for each of YOUR creatures, and targets are set.
Meteor will wipe your board.

{Accelerate} and other red cantrips draw lots of cards..

{Arcbond} To end the game. Fast.
You just need to shield yourself with something.

[Codester1991]

{Chandra's ignition,} {assault strobe}, {temur battle rage}, {Titan's strength}, any other red pump.

[Kaylesh]

{Chandra's ignition,} {assault strobe}, {temur battle rage}, {Titan's strength}, any other red pump.

If you want to go the combo way of {arcbond} and {Chandra's ignition}, I highly suggest {mycosynth lattice} & {darksteel forge}. Two indestructible arcbonded creatures + damage= game over. In that case I also advise lifelink equipment.
But, if you prefer, there's plenty of buff in red to make an all out aggro one.