I just noticed the Syngery between Polearm Master and Warcaster.
Example Warlock Blademaster, weapon of choice a Glaive. This Warlock has all the Eldrich Blast buffing invocations.
Polearm Master allow you to take an opportunity attack when someone enters reach of your Polearm, and Warcaster allows you to use a two handed weapon and somatic compenents and to cast spell at them instead of an opportunity attack.
So the Warlock could nail someone with Eldrich Blast with agonizing blast and repelling blast on it, hitting it hard and knocking it backwards when it enters the range of your Glaive.
A Fey Knight could use it to cast Moonbeam on it instead. Of course the Fey Knight would be better off just hitting it with Ensnaring Strike and its Glaive and then on its turn cast moonbeam. Or depending upon the enemy banish.
Example Warlock Blademaster, weapon of choice a Glaive. This Warlock has all the Eldrich Blast buffing invocations.
Polearm Master allow you to take an opportunity attack when someone enters reach of your Polearm, and Warcaster allows you to use a two handed weapon and somatic compenents and to cast spell at them instead of an opportunity attack.
So the Warlock could nail someone with Eldrich Blast with agonizing blast and repelling blast on it, hitting it hard and knocking it backwards when it enters the range of your Glaive.
A Fey Knight could use it to cast Moonbeam on it instead. Of course the Fey Knight would be better off just hitting it with Ensnaring Strike and its Glaive and then on its turn cast moonbeam. Or depending upon the enemy banish.