As a reaction, which you take when you or another creature that you can touch or see within 18 meters makes an attack roll, an ability check, or a saving throw, the creature has a second chance. Roll a d4 and apply the number rolled as a bonus or penalty (your choice) to the creature’s roll. You can do so after the creature rolls but before any effects of the roll occur.
You can expend 2 additional mana or psi to roll 2d4.
You can expend 4 additional mana or psi to roll 3d4.
You can expend 1 additional mana or psi to reroll an attack roll, ability check, or saving throw you make.
You can expend 2 additional mana or psi to reroll if you miss on an attack, fail an ability check, or fail a saving throw.