Well Actually, if this is Natsu's Full Power, then he might stand a chance, I heard small multipliers count now so since Zeref has both Fairy Heart and Space Between Time, and both of them are Comparable to Dragon Cry, so that's 2 times 24.7 pettatons, which is 49.4 Pettatons, and then Natsu who is stronger than that Zeref, and normal Dragon Acnologia is about equal with that Zeref, and then he absorbs the Space between time making him at least 74.1 Pettatons, Seven Flames Dragon Mode Natsu is comparable to that Acnologia, and then stacks Dragon Force, on himself which is a confirmed an at least 3 times multiplier, so that at least puts him at 222.3 Pettatons, so don't sleep on Natsu, I think you're Underestimating his versatility here, for one he has 7 elements now, and Soul Manipulation, what does Dangai Ichigo do Usually, just Physical Attacks, until Mugetsu, I think Natsu's AOE and Versatility are gonna come in Handy, And give him the win as Ichigo won't be doing a lot things besides swing his sword