Chain Lightning

Chain Lightning deals 3 damage to any target. Then that player or that permanent's controller may pay {R}{R}. If the player does, they may copy this spell and may choose a new target for that copy.

Crimson Kobolds

Kobold Overlord

First strike
Other Kobold creatures you control have first strike.

Crookshank Kobolds

Fork

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

Kobolds of Kher Keep

Mountain

Blood Lust

If target creature has toughness 5 or greater, it gets +4/-4 until end of turn. Otherwise, it gets +4/-X until end of turn, where X is its toughness minus 1.

Dragon Whelp

Flying
{R}: This creature gets +1/+0 until end of turn. If this ability has been activated four or more times this turn, sacrifice this creature at the beginning of the next end step.

Gauntlet of Might

Red creatures get +1/+1.
Whenever a Mountain is tapped for mana, its controller adds an additional {R}.

Kobold Drill Sergeant

Other Kobold creatures you control get +0/+1 and have trample.

Lightning Bolt

Lightning Bolt deals 3 damage to any target.

Shivan Dragon

Flying
{R}: This creature gets +1/+0 until end of turn.

Kobold Taskmaster

Other Kobold creatures you control get +1/+0.