Timeline-Splitting Spell vs Quickened Cast

[HumbleGamer]

Quickened Cast

Quote:

lvl 10 ( or 12 for the time mage )

Frequency once per day

If your next action is to cast a cantrip or a spell that is at least 2 levels lower than the highest level spell slot you have, reduce the number of actions to cast it by 1 (minimum 1 action).

Timeline-Splitting Spell

Quote:

lvl 18

Frequency once per day

You invest in two futures, then choose the one to make a reality. You Cast two Spells that each take 1 or 2 actions to cast. These can't be the same spell heightened to two different levels. You expend the resources for both spells, such as spell slots, Focus Points, and material components. Determine the immediate results for both spells, including attack rolls, saving throws, damage, and any other dice rolls. Then, choose which of the two spells takes effect, using the previously made rolls. The other spell's resources are still expended, but the spell has no effect as the magic disappears the other timeline.

I am not sure whether I got the feat wrong or it's just a maximum trolling.

the former allows you to cast 2 spells ( the sencod has to be 2 levels lower ).

For example, Meteor Swarm + lvl 7 cone of cold.

The second allows you to cast 2 spells ( different spells, but they can be of the same level ).

For example, Meteor Swarm + lvl 9 cone of cold

The former hits all enemies twice, while the latter allows you to just keep one of them ( if multiple rolls involved, you might even find yourself into a situation 50/50 ).

As said before, I don't get it.

ps: controls meant to be used against a boss, and because so without incapacitate trait like slow, synesthesia, etc... are low level enough to be used twice with quickened cast. So no issue here.

[breithauptclan]

I can think of some edge case uses for Timeline-Splitting Spell ... if it only cost two actions to use.

But with it costing three actions, I can't think of any scenario where it would be better to not just actually cast two spells for three actions using Quickened Casting.

Having both feats does let you do each trick once per day separately. If you can only fit one feat into your build - pick Quickened Casting.

[gesalt]

There's a very special case I can conceive of. Use into the future to cast time beacon on your next turn. Use timeline splitting spell to fish twice for a good outcome, reset to turn start if you fail. Quicken another time beacon and use timeline splitting spell again (Assuming your gm accepts an ability being on cooldown and slots being expended as effects of your turn that gets undone). Then reset again if you fail and maybe hardcast time beacon a 3rd time to get two more chances at getting your primary spell to land.

Probably the best way to fish for a failed save if your gm doesn't shut you down.