FFXI had this. They were called 1 hour abilities (originally 2 hours, but they got buffed.)

Some were better than others. Most DPS classes were really strong, but then there was NIN, who got Self Destruct. Bard (a support class in XI) had the potency of their songs double. Red mage got 30 seconds of nonstop casting. If I remember right, black mage got no MP spells. That sort of thing.

Most of them made their way into XIV in some form or another, for example XI's paladin got 30 seconds of pure invulnerability with Invincible, whereas XIV's paladin has Hallowed Ground.

https://ffxiclopedia.fandom.com/wiki/One_Hour_Ability