Deepwater Dungeon Prep
Deepwater Dungeons spawn in oceans and dripstone caves and are filled with drowned. Before entering, enchant your helmet with Respiration and boots with Depth Strider, and bring potions of Water Breathing and Night Vision. A trident with Impaling or a bow with Power helps pick off drowned from range. Bring blocks to seal off flooded corridors and create air pockets. Watch for trident-wielding drowned — they hit hard and can throw from a distance.
Frozen Dungeon Prep
Frozen Dungeons are wet, cold, and snowy, and are packed with strays. Wear full armor with Protection and bring a shield. Strays apply Slowness with their arrows, so carry milk buckets or honey bottles to clear the effect. A bow with Flame or a sword with Fire Aspect helps, but be careful not to melt your own footing. Bring torches to light the dungeon and prevent further spawns.
General Survival Tips
In both dungeons, break the spawner as soon as you can reach it — that stops the endless mob flow. Fight from chokepoints and never let yourself get surrounded in a flooded or icy room. Keep a bed and spare gear nearby in case you die, and mark the dungeon entrance with a torch or banner so you can find it again.
