Ple-Sen
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Summoning something in the hope that it will shoot/cast spells/fly/teleport? It looks like a very risky gamble, but the alternative is just to put a mirror on one unit, which isn't bad, but it feels a bit underwhelming and not like a winning strategy.
However, most likely I'll just get shot down before I can even move, so I won't have to rack my brains.
Added 36 minutes later
For now, I confirm the actions I described, in general.