"Two Seasons: Winter - Spring 2017-18". Online games.

The map had many one-way portals! Vidomina (bought in week 1) and Gosha (bought in week 3) were my heroes, and by day 143, I had collected about 900 skeletons + all the Necromancer artifacts. Shakti took one of my towns, and on my turn, Gosha caught him inside. Gosha had 8 Attack, 48 Wiverns, and about 900 Skeletons. Shakti had 5 Attack, 6 Manticores, and 55 Evil Eyes.
Thank you for the game!