So what is the solution? Jinx, Block, Reverse Magic, Walls, do the same thing?
We have to be honest here, the Necromancer's play was not very good, to put it mildly.
He just got double-bouldered and what was his reaction ?
He spent all his mana on ... Mort. That helped.
Apparently he didn't see the need for some armor - which he didn't play at all.
A simple Brace Yourself would already have gone a long way.
While games like these may leave some (new) players in awe and scratching their heads
it is important to realize that the quick finish is just the result of one player being new or inexperienced.
There is a parallel here of course with one player just focusing on creatures ( Earth Elementals / Mort-Deathfang ) and ignoring his safety and the other just taking advantage of that and finishing the game in 4 rounds with Attack spells.
I understand, Donovan, you don't like to play "like that" but if the opponent makes those mistakes it's only fair to exploit them. It will make both of you better as a result. This should only happen once to a smart player, which I'm sure your son is. Playing this game at age 10 speaks for that.