To follow sjaminei's lead:

1.) Have spiders web everything they can.

2.) Cast Infection on the weakest spell resist enemy.

3.) then graveseal on the same enemy.

4.) Win

Or:

1.) Turn every shard into a death shard with corruption

2.) Cast Dirge Of Ceresa

3.) Win

or:

1.) Get blizzard

2.) Cast blizzard

3.) Win

Or:

Or:

1.) Turn every shard into a death shard with corruption

2.) Cast Wither on everything

3.) Win

Hope you have some luck. Ceresa is probably the best sovereign if you have steady mana flow.

I shadowbolt everything :lmao When she reaches high level she is a dangerous opponent.

Young crow demons are good if you can get them up to size 5. One strategy is to snake to a shard with a good forteress. Build the shard only after the city touches it. Now the demons will have all stat boosts from the forteress, including enchantments.

Save some easy targets near the town to number up the crow demons (use wither).

If you are lucky and find a 3 essence spot and get a fire mage for Heart of Fire you can get a 12x5=60 fire attack unit quite early that rips through almost anything. Synergizes well with infection/graveseal/wither.