The Magatsuhi gauge

Each side has a Magatsuhi gauge from 0 to 100. At the end of each of your phases it grows by a random 15 to 25 points, so it fills about every fifth phase. When it is full, one of your demons can use a Magatsuhi skill:

• the gauge drops back to 0;
• it costs no press turn icon, and the same demon acts again right after.

So a full gauge is a free, powerful action at the moment you choose.

Which Magatsuhi skills a demon has

Source	Who can use it
Omagatoki: Critical	every demon: until the end of your phase, all your attacks are critical hits
Race skills	demons of a race; for example Eternal Prayer (Megami) fully heals and revives your team, Shield of God (Herald) greatly reduces damage to your team until your next phase
Alignment pairs (Vengeance)	when two living demons on your team share an alignment, they unlock that pair's skill
Demon sets (Vengeance)	some skills need a full set of specific demons alive on your team

The team builder lists every Magatsuhi skill a demon can have and the condition for it.

Using it well

• Omagatoki: Critical turns every attack into a crit, and every crit gives an extra press turn. With 4 icons that is up to 8 critical hits in one phase: save it for the phase that can win the battle.
• Defensive skills like Shield of God are best used at the end of your phase, before the opponent's big turn.
• A demon set or alignment pair only counts while those demons are alive, so losing one can lock the skill.