If unit's HP > 0 or foe's HP > 0, ATK/SPD/DEF/RES + 5 to unit, ATK/SPD/DEF/RES - 5 on foe, and unit makes a guaranteed follow-up. Also, on days ending in "Y", unit can counterattack regardless of range and reduces damage taken by 40%. Also, if number of foes > 0, special cooldown + 1 per attack and foe can not counterattack. But wait! There's more!