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Day 2: Mouse Trap

Condition For Winning: Destroy all of Advocat's Runes
Unit(s): Elf x4, Fairy x2, Ghost x4, Phantom x2, Skullmage x2, Homunculus x2, Golem x2 Rune(s): Fairy Ring, Hades Gate, Purgatory, Lab.
Just like with the other battle, only destroy Advocat's runes, not Gammel's.
Work your way from the right of the stage, then up the stairs to the upper left, finally descending down to finish the job. Unlike the other stage, Gammel's familiars are much more aggressive, so you'll need symbols to defend yourself.

Gather mana with your Elves and Ghosts. Place your Skullmages and Fairies near the crystal to the upper right. Create an Engrave and level it up to 4. As you're doing so, create a Blob and also level the Hades Gate to the max. Move one Golem to the bottom floor, near the stairs, and the other, underneath the Fairy Ring. With your Blob, advent 2 Gargoyles underneath the green wall near the Fairy Ring, and 2 more underneath those. Lastly, level up the Lab to level 3, create 6 Phantoms, and move your 2 Homunculi near the Gargoyles.

Now, your defenses are set. Once your 6 Phantoms are done, join up with the other 2, then walk up the stairs to the right of the upper right sanctuary.
After walking up 4 flights of staris, take a left and kill the Guardians and enemies here. Now is a good time to create more backup units, even if you haven't lost any. Keep going up the stairs and kill the Guardians to your right. Hang a left on the floor below the highest floor and destroy the sanctuary and any enemies here.

When I was doing this part, my Golems stupidly went to Gammel's base and provoked him, sending all his Fairies, Unicorns, and Morningstars to me as well as Advocat's Phantoms and Devils. If this happens to you, create more Homunculi and have them use Psychic Storm to take care of the situation. You should also use your backup Phantoms, granted that they haven't already been released of their backup position.

Using your Phantoms that should already be at the top of the map, backtrack to the stairs and climb to the highest floor. Go left and you should run into a Guardian. Kill her, but don't go anywhere yet. If you only have a few Phantoms remaining, bring some more before continuing left. Be sure to make more Phantoms.

To the left on the highest floor is a Gehenna. Destroy it, but get prepared for a swarm of devils. Symbols should go first, then Demons, followed by everything else. There's also a dragon a bit down the stairs, but only confront it with at least 5 Phantoms close to full health.

A dragon will also come to attack your base at 11 - 12 minutes, so get ready with some Phantoms.

After you defeat the dragon in the upper left corner, destroy the Chaos Nest, then the symbols, then the Hades Gate, then finally, the Hell Gate. If you are fast enough, you can finish the stage before a Morningstar gets you.