What kind of magic do you like?

Conclusion: on the first turn, the Druid casts antimagic on himself, summons whoever he wants, and then casts antimagic on them; then the Mage smiles.

This is possible if the Druid goes first. If the Mage goes first, the victory is his. But it all depends on the player. An unskilled player can lose even with a strong army, while a skilled player can win with a weak one.