"Nova Grappler" (ノヴァグラップラー Nova Gurappurā) is a clan from the Star Gatenation, and one of the first four clans in the game. The clan is themed around giant, human-piloted robots and aliens who fight competitively in matches similar to that of real-world mixed martial arts matches.
Nova Grapplers have a high-risk, high-reward playstyle in which they deliver multiple high-powered attacks at the expense of resources to quickly take down the opponent. This is accomplished through standing their rearguards during the battle phase and power-increasing card effects that require the player to commit cards from their hand to the field. Nova Grappler tends to sacrifice defensiveness for additional powerhouse offense, so they aim to defeat the opponent faster.
The Beast Deity series introduce the ability to have a rear-guard attack during the main phase, then stand that rear-guard if the attack did not hit.
The Heroes take a different approach to the high-risk, high-reward style of the clan, allowing themselves to take damage then retaliate by becoming more powerful the more damage the player has.
Nova Grapplers has the Accel Imaginary Gift, which further enables their aggressive playstyle by giving the player more rear-guards to attack with.