Alrighty, here’s some stuff Grima:
Future Past Grima is basically comprised two person. The Body which is the giant dragon body and the Heart, which is the one using Robin who control and direct Dragon Grima’s actions.
AP wise, he is casually 340.4 Gigatons, meaning he is above that if serious. He can increase his strength with Ignis and since he has Rightful God, it is very likely to activate
He has an aura that bring about a sense of dread, not to mention that anybody near him will have their evasion rate lower due to Anathema
Due to Dragonskin + Pavise+/Aegis+, he‘s basically have a 4x reduction in damage for both close range and long range attacks
His Expiration negates defenses… basically dura-neg. His Dark Spikes is basically him summoning bunch of spikes to stab his opponent from beneath.
One of the first thing he do in every battle he is in is summon an army of Grimm to his side, who can fight people that can pose a threat to Grima, and can replenish it
near endlessly according to Naga (Check 7:30). It can get to a point where if he is not stop eventually that according to
Lucina in her C-Support with Robin:
In the future, almost no corner of our world is safe for humans. Risen prowl the land as masters of all. The people cower in terror, helpless.
… Though if we go Gameplay wise, it is about 50 at max, with 4 replenishing every turn.
Due to Hawkeye, Grima’s attack is 100% accurate, regardless of his accuracy or the target‘s evasion rate.
He is a gigantic boi that can fly and has range around Hundreds of Kilometers
Since he‘s using Robin body, he can utilizes Robin’s Analytical Prediction to see his enemy's strength, their weaponry, and the flow of battle, allowing him to know how powerful the enemy is from him and plan his moves
