RPGMemes

my final battles will not use mechanics the players aren't familiar with

This seems kinda boring.

I pretty much expect a big bad to pull some off the wall crap I'm not expecting, otherwise what makes them big & bad?

The morale shattering of getting a revival countered would make the party come up with something new, instead of trying their same formula over & over. Remember the magic mcguffin they've been saving for a 'situation'? This is exactly the time to break out the one-shot items!

It also seems kind of spiteful? Revivify seems like an odd thing to counterspell, much better to stop a big damage spell or heal. Revivify only revives with 1 hp, so a strong breeze would put the barbarian back down. The party would have to commit multiple actions to healing him up while he runs for his life.

Instead, one of the players basically has to sit out for the finale of the campaign. Assuming the party succeeds, he can’t conclude the story with everyone else and the player just zones out during the epilogue.

I think a good twist mechanic is one you can react and adapt to. If the dragon countered a random damage spell, the players are introduced to the twist in a less consequential way and can now adjust their strategy to the new information. Here, they are punished for something they didn’t even know could happen (unless they have meta knowledge from other campaigns, which you should never assume) and can’t do anything except shrug and accept that their friend is dead.

A counter spell prevents other magic users from casting their spell. It can be used by a magic user to block a spell to various degrees of success. This DM didn't use it with any villains in the campaign, except once, to block a resurrection in the final battle.

He killed a guy's charector, then basically re-killed him right after.