There are two notable exceptions to damage boosts all being limited to once per turn in OneD&D. Both of which are on the Warlock.
The Agonizing Blast Eldritch Invocation and the Cantrip Upgrade section in the Book of Shadows cantrip.
Both allow you to add your spellcasting modifier to the damage rolls (plural) of Eldritch blast. Thankfully they don’t stack but you can easily get up to 4 instances of that damage boost within a Warlock’s turn or 8 instances if that Warlock multiclassed Sorcerer or took a feat that allows them to use Quickened Spell.
There are two notable exceptions to damage boosts all being limited to once per turn in OneD&D. Both of which are on the Warlock.
The Agonizing Blast Eldritch Invocation and the Cantrip Upgrade section in the Book of Shadows cantrip.
Both allow you to add your spellcasting modifier to the damage rolls (plural) of Eldritch blast. Thankfully they don’t stack but you can easily get up to 4 instances of that damage boost within a Warlock’s turn or 8 instances if that Warlock multiclassed Sorcerer or took a feat that allows them to use Quickened Spell.