EXP Chance can be attached to a Type B or Type J Command Recipe through Command Fusion, either randomly or by applying a Rich Crystal.
Again: Synthesize Fira and Fira with a Source Crystal to create Firaga; it will have attached once more. For a second chance: Synthesize Cura and Cura with a Pulsing Crystal to create Curaga; a second chance is appended.
Sora learns “One More Time” at level 25 with the Dream Shield, level 28 with the Dream Staff, and level 47 with the Dream Sword. Goofy learns “One more time” after defeating Oogie Boogie in Christmas Town.
Mega Flare is an Ultimate class Magic Command that can be fused through a recipe listed in the Giga Magic recipe. The recipe can be fused by Terra, Ventus and Aqua and is a B recipe.
Curaga is an advanced class magic command that can be fused through two different recipes listed in the Mega Magic Recipe. The first recipe can be reported by Terra, Ventus, Aqua and is an M recipe. The second recipe can be reported by Terra, Ventus, Aqua and is an N recipe.
Kingdom Hearts II / Kingdom Hearts II Final Mix
Sora learns “Second Chance” at level 49 with the Dream Shield, 65 with the Dream Staff, and 85 with the Dream Sword. Goofy learns “Second Chance” after removing the explosives from the Interceptor. Beast has Second Chance as a default ability.
Leaf Bracers can be attached to a Type A, Type B, Type E, or Type F Command Recipe through Command Fusion, either randomly or by applying a Pulsing Crystal.
Buy some Fires and Blizzards. Fuse them into Firas and Blizzaras. Blizzara+Blizzara+Pulsing Crystal = Second Chance.