Revived

hydras – they appear automatically.
It would be good to see what the console says in case of this error...

try-catch – that is, exception handling...

is there any example with it?

I haven't encountered it in game scripts.

yes, I killed hydras with vampires and the Ring of Exile, so there was enough space on the battlefield. But I remember when I was testing, I brought it to a situation where the entire field was filled with hydras. Then new ones appeared under the old ones.