The idea of witches racing while casting spells to slow down their competitors sounds like a fun mix of strategy and chaos! Are there any spells that can completely turn the race around when someone is close to winning?
Yes! The most powerful example of this is the "Body Swap" spell. It swaps another player's progress with your own - it isn't cheap to cast so it can require some preparation, but also it can be countered with a little preparation too so the final rounds of a game can get pretty intense!
Most other options involve trying to trip up a player in the lead, so they will often be busy trying to find a way to cast the winning spell without anybody interfering.