How to Get Fire Surge in Kingdom Hearts Birth by Sleep

How to Meld Fire Surge (All Guaranteed)

Three of the four just want Fira plus a basic physical command, so use whichever of Fire Strike, Confusion Strike or Binding Strike you can spare.

Which Crystal Should You Use?

Nothing can fail here, so choose purely on the ability.

Fire Dash + Ignite or Fire Strike + Fira with a Pulsing Crystal gives Leaf Bracer. Two guaranteed routes to Leaf Bracer out of cheap ingredients is a good deal, especially early. The other two recipes give Finish Boost on Pulsing instead.

For a fire-focused deck, Fire Strike + Fira gives Fire Boost on Shimmering, while Fire Dash + Ignite gives Fire Screen. Boost is offensive, Screen is defensive.

Fire Strike + Fira is also the only one of the four that gives Magic Haste on Fleeting. The other three all give Attack Haste, which fits better given Fire Surge is a physical command.

If you plan to turn it into Aerial Slam or Dark Haze, level it to max first or the ability goes with it.

Commands That Use Fire Surge as an Ingredient

Six recipes want one, which is the main argument for keeping a spare:

• Aerial Slam, from Fire Surge + Aero, all three characters, 100%
• Dark Haze, from Fire Surge + Zero Gravity, Terra, 100%
• Fire Glide, from Fire Surge + Glide, Ventus, 100%
• Payback Surge, from Sliding Dash + Fire Surge, Aqua, 100%
• Firewheel, from Fire Surge + Cartwheel, Aqua, 90%
• Raging Storm, from Fire Surge + Cartwheel, Aqua, 10%

Watch the last two. Fire Surge + Cartwheel gives Firewheel nine times out of ten and Raging Storm the rest, so chasing Raging Storm from this pair means repeating it.

Aerial Slam and Dark Haze are the important ones. Aerial Slam feeds Ars Arcanum and Time Splicer, and Dark Haze feeds Chaos Blade, Ars Solum and Dark Firaga.