Speed, or SPD, is the stat that determines which Nanovor moves first in a battle.
SPD is a modifiable attribute; meaning that a Nanovor's SPD can be permanently increased through the use of Jolts.
Hexites are known for having the highest SPD stats of any Nanovor, closely followed by Velocitrons, with Magnamods being the slowest. SPD works like this, as quoted from Wikipedia:
The nanovor that goes first in a battle is determined based on every nanovor in the battle's speed. It works like a raffle. For example, in a battle between a 50 speed nanovor and a 20 speed nanovor, the first will have 50/70 chances of going first, and the second 20/70 chances of going first.Hexites, such as Spike Spine, are very fast. Employ Hexites to finish off enemies with low health without a scratch!