Imaris
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"Our" army is Haven, we are fighting against Sylvan with their own creatures. The races are unknown, neutral ones are possible. Haven can have 16 different castles (8 for us, 8 for them), but it seems that's not allowed, the maximum is 8.
Added after 4 minutes
He forgot that demons are attacking, so Sylvan is playing as demons... It's a pity to treat our little red friends so badly... ); ); );