It will take about 15 minutes of all 4 of you beating on the door in order to break it down. OR, you could go back out and attempt to find another way in. It's up to you.

“Anything other than the front door is certain to get us killed.” Rush nods and readies to put boot to door

Andrømeda laughs at that. "Vhat is beyond here may be de end of us as vell if den vas so bad, ja? Either vay, Am'm all for de front door." She squares up her stance, ready to deliver another heavy front kick.

Not one for physical labor himself, Kwisatz first goes up to the large door, looks to Duncan and says to him “Let’s see what you can spot for us really quick eh?” 

Duncan then disappears from Kwisatz’ shoulder, and appears 20 feet in front of him, on the other side of the door. Kwisatz then goes blind and deaf to the world around him, as he looks through Duncan’s eyes and ears. ((Perception 11)) If there is any danger he’ll immediately pop Duncan back, and if not will see what can be seen or heard on the other side.

The party sees Duncan begin to launch off of Kwisatz's shoulder, but before it goes anywhere, it just blinks out of existence. Then, you see Kwiz's eyes glaze over like a cloud is covering all of the color of his irises and pupils, his jaw goes slightly slack and his shoulder slump. 

Less than 30 seconds pass, as Kwisatz eyes come back into focus, and he starts blinking, readjusting to the light out here, Duncan also reappears on his shoulder. He looks to Andromeda as she kicks against the door and says “My dear, it seems your strength really is enough to alert the gods and wake the dead. It seems that in the years that our dear town master has not contacted these Dwarves, something has happened. Just inside that door are a number of undead dwarves, and more coming into the chamber. Though I know you relish the chance to cleave things in two, perhaps we should attempt to find another entrance...”

Andrømeda looks at Kwisatz, her foot raised in the air for another strike. She turns to look at the door than back at Kwiz, her foot still up, and a look of consternation on her face. "...How many?"

“... can’t be that many,” says Rush with a bizarre combination of shy and eagerness for battle

“At least half a dozen. Though likely more coming.” Kwisatz says. “Clearly our noises have alerted them. This may be the only way in, but it’s not impossible that there would be another entrance. If possible, and we could find another entrance, we could set an ambush as the ghouls have been attracted to the noise. Would anyone like to accompany me to look for another way in?”

Kwisatz will then head back, alone or with another, to look for walking paths, or any signs of a back or side entrance. He’ll also send Duncan up to see if the bird’s eye view can spot anything.

Rush shrugs and pauses... calling on his elemental heritage, Rush creates a pool of water, which he then shapes and freezes around the door to keep the door from being easily broken by the zombies.

"I'll go with you, Kwis.  I think these two can handle the area for the moment," says Sael.

Andrømeda puts her foot down with a huff, though she grins. "Dir is not point in separating ourselves, ja? More so vhen vi know dir is danger around already. Vi vil search for another vay together."

Sael grins back.  "Let's do it."

Andrømeda knocks Sael on the shoulder as she moves to follow Kwiz, laughing, "Ja, vi vil get to ha our slag one vay or de other."

Quote from kevtr0n >>

“At least half a dozen. Though likely more coming.” Kwisatz says. “Clearly our noises have alerted them. This may be the only way in, but it’s not impossible that there would be another entrance. If possible, and we could find another entrance, we could set an ambush as the ghouls have been attracted to the noise. Would anyone like to accompany me to look for another way in?”

Kwisatz will then head back, alone or with another, to look for walking paths, or any signs of a back or side entrance. He’ll also send Duncan up to see if the bird’s eye view can spot anything.

Perception 2; investigation 14; Duncan perception 14  - some ‘help’, or ‘guidance’ might be needed :P

 

Kwizats, himself barely notices the rocks at his feet or the trees that lined the roadway they arrived here on with that perception roll, but Duncan spots numerous stone chimneys protruding from the mountainside. It looks as if an earthquake closed off most of those to anything but Tiny creatures, but Duncan does notice, on top of the fortress itself is a handful of chimneys that the adventurers might actually be able to fit through.

Duncan also spots what looks like a pathway that a goat might use that could possibly get the team up to the top.

Perception checks for the rest of the party:

• Andrømeda: 21
• Rush: 10
• Sael: 23 

 No one else sees any other entrances or potential entrances.

Kwisatz shares that information with the group adding “I could send Duncan down one of the chimneys to see if he can get inside. Though I’ll need to go up with him to the entrance to stay within range of him as he explores down. If they do lead in, it might be worth continuing to ‘knock’ on the door here, as that seems to draw what’s inside to it.”

Andrømeda frowns at that. "Den seems like many extra steps vhen vi could just valk in. Vi vil be slåssing dem anyvay, ja?"

Thinking for a minute, Kwisatz replies “That is true... you shall be slashing away. But if we can gain an element of surprise your slashing may be easier no?”

Shrugging, Andrømeda sets her greataxe on her shoulder. "If vi can find a way for us alle to get in, and vi actually surprise dem. Am'm thinking den vil prove to be not so easy, and even if vi do, vi vil likely only drepe a couple before vi are noticed, ja?" She taps her chin with a finger in thought. "Maybe du go up, vi vatch dun back, and see if du can find anybody who lives? If vi can tell dem vi are here to help, maybe they sneak from behind vhile vi face de valking likene from de front?"