Spell Chain

With the spell Chain feat you can spend 2 sorcery or warlock points to cast an additional spell with a casting time of 1 action or 1 bonus action this turn.

This can be done multiple times per turn, with the sorcery point or warlock point cost increasing by +1 for each additional spell in the Chain

1st additional spell costs 2 points

2nd additional spell costs 3 points

3rd additional spell costs 4 points

And so on.

You can cast as many additional spells in the Chain as your points and spell slots allow, up to your spell casting modifier.