Anton and Julio both fling acid splashes. Julio's hits, Anton's misses.

Mika slices deep into a goblin. It collapses.

The last goblin looks around at its fallen comrades and runs away!

As is proper. Perhaps it can warn whatever others there are not to attack them on their way back.

These two are better dead, though. Not worth the bolts, not with Mika there. She draws her sickle. 

By the time she's prepared, Mika has already started to behead the other. This is going to embarrassing, but oh well. Chop!

...yep, that's a failure. She can't get the blade through the goblin tendons cleanly. She leaves it to Mika to finish off.

Mika finishes them off. "Ehh, they've nothing good, just shoddy gear and a few pinch."

Nod. "With luck, the runner will warn the rest off from a follow-up."

The maze continues. Anton guides them through the rest of the winding passages, through a trapdoor and down the ladder into the tunneled caves. They pass through the cavern and start crossing the underground rivers.

She goes to ask Julio for a Prestidigitation cleaning —

No, she can do this herself. Of course she wouldn't forget, she knew it in the vision and she remembers it perfectly fine now. She flicks through the motions and indeed, as expected, the water flows off her robes and back down into the river.

Five minutes past the cavern rivers and they're at the illusory wall. Mika helps pull everyone up.

"The magic door is over there." She points. "Feel free to check. There are a couple zombies on the other side. As you may or may not know, zombies are slow, and if you keep away from them they are almost unable to touch you unless you leave an opening. However, on clear enough terrain, they can just run all-out and strike with the force of their charge, which is little better. This is why we brought marbles. If we scatter these regularly around the room, they will find it difficult to charge. With luck, they will trip in the middle of their charges, and a toppled zombie is nearly incapable of being a threat while it recovers its feet.

"This means there are two things to remember: stay beyond their arm's reach, and keep at least ten feet of marbles or some other intervening object on the direct path between you. If you retreat from them with caution, you should be able to avoid falling on the marbles yourself while still remaining beyond their reach. My friend will attempt to block if needed, but it is limited. If you let them land a solid blow, you two," indicating Julio and Anton, "will be knocked unconscious. The hope is that they will let you bleed out slowly so we have time to rescue you after they are dropped. If they instead actively attempt to kill you, you will most likely die. Mika, you may be able to remain upright through a single strike. Do not rely on it, and do not expect to sustain two.

"Zombies are also tough, and stabbing or beating them to death is all but fruitless. Enough force could help, but the best plan is something which can cut the muscle and tendon they rely on for power. Mika, avoid your shortsword, your knife will be more effective."

That said, she gets to marble scattering. Why yes she did do some research on zombies after almost dying to them in the vision, why do you ask.

"How do you know—"

Julio casts detect magic at the section of stone wall. "She's right, the door's here. Mika, you're up."

Mika grunts, pulling out a dagger and a small hammer. "This'll take a few minutes."

He starts his strange dagger-and-hammer arcane lockbreaking routine. A few minutes later, the door creaks open.

The stench of rotting flesh fills the air.

Anton mutters. "Does she seriously have a better map then us?"

She probably should have been focusing on Mika's lockpicking, not her own marble scattering. Oops. By the time she's started her first cast, the zombies have long since shambled into motion.

Mika pulls a dagger from his belt and throws it. The dagger slams into the zombie's chest.

He walks back into the hallway and around the corner. "Everyone back it up!"

The zombie staggers slightly from the dagger, before rushing forward. It just barely makes it through the stone door.

A second zombie shambles into the central room of Matei's lair. It's a few feet behind the first.

Acid Splash first, this time with her fake brimstone adjustments.

It goes just past the first one's ear. Close, but not quite. Time to back up now. (The blob hovers anticipatorily.)

Julio flings a glob of acid, which sizzles against the first zombie's arm.

Mika flings another dagger. It misses and skids against the floor. He walks back another twenty feet.

The zombies run down the hallway toward the party, but they can't quite get there yet.