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The Grubfather is an elderly Grub[1] found in the north-west corner of the Forgotten Crossroads in a room full of small Grub dens; this room is referred to as the "Grubhome" in an official map. He will reward The Knight for each Grub found.

When first encountered, he will be crying as all the Grubs have been taken from their dens. When the Knight returns after freeing Grubs, the Grubfather will reward the Knight with Geo and other items according to how many Grubs have been saved.

There are 46 Grubs to be found in total. Rescuing 23 Grubs rewards the Grubfriend achievement, while rescuing the last Grub unlocks the Metamorphosis achievement.

After all Grubs have been rescued and rewards collected, returning to the Grubfather will reveal that all the Grubs are gone from their holes, and the Grubfather is now laying in the centre of the room, his stomach extremely bloated. The muffled noises of Grub chatter can be heard from inside of him.

Grubs

Grub

Grubs are creatures found trapped in glass jars throughout Hallownest. When The Knight is close enough to their location, a faint crying noise can be heard in their general direction. They talk in high-pitched babbles and cannot be spoken to. When hit with the Dream Nail, their thoughts read "...Home...". They can be freed by breaking the jar with the Nail, after which the Grub will burrow into the ground and return to the Grubfather. Obtaining the Collector's Map after beating The Collector shows the locations of unfreed Grubs.

Locations

Rewards

Rewards are based on the total number of grubs saved, not which grubs have been saved.
Number Location Requires Reward
1 Forgotten Crossroads - Geo10
2 Forgotten Crossroads - Geo20
3 Forgotten Crossroads Breakable wall Geo30
4 Forgotten Crossroads Spike bounce Geo40
5 Forgotten Crossroads Mothwing Cloak (or nail bounce) Mask Shard
6 Greenpath - Geo50
7 Greenpath - Geo60
8 Greenpath Defeat Moss Knight Geo70
9 Greenpath Mothwing Cloak Geo80
10 Fungal Wastes Mothwing Cloak Grubsong
11 Fungal Wastes Mantis Claw Geo90
12 City of Tears - Geo100
13 City of Tears - Geo110
14 City of Tears Desolate Dive Geo120
15 City of Tears - Geo120
16 City of Tears Monarch Wings Rancid Egg
17 Crystal Peak Mothwing Cloak

and Mantis Claw

Geo140
18 Crystal Peak Crystal Heart Geo150
19 Crystal Peak Monarch Wings Geo160
20 Crystal Peak Crystal Heart Geo165
21 Crystal Peak Mothwing Cloak Geo170
22 Crystal Peak - Geo180
23 Crystal Peak Platforming Hallownest Seal
24 Resting Grounds Desolate Dive Geo200
25 Royal Waterways - Geo200
26 Royal Waterways Crystal Heart

or Isma's Tear

Geo205
27 Royal Waterways Isma's Tear Geo210
28 Howling Cliffs Mantis Claw Geo215
29 Kingdom's Edge Desolate Dive Geo220
30 Kingdom's Edge Mantis Claw Geo220
31 Fog Canyon Crystal Heart Pale Ore
32 Queen's Gardens - Geo230
33 Queen's Gardens Everything Geo235
34 Queen's Gardens Mantis Claw Geo240
35 Deepnest Breakable wall Geo245
36 Deepnest Breakable wall Geo250
37 Deepnest Crystal Heart Geo255
38 Deepnest - King's Idol
39 Deepnest - Geo260
40 Ancient Basin Mothwing Cloak

and Monarch Wings

Geo265
41 Ancient Basin Desolate Dive Geo270
42 The Hive Desolate Dive

& Isma's Tear

Geo280
43 The Hive Desolate Dive,

Isma's Tear &

Monarch Wings

Geo290
44 Tower of Love Love Key Geo295
45 Tower of Love Love Key Geo300
46 Tower of Love Love Key

Grubberfly's Elegy


Dream Nail Dialogue Essence
  • Happy...happy...happy!!!

Achievements

Achievement Grubfriend Grubfriend
Rescue half of the Grubs
Achievement Metamorphosis Metamorphosis
Rescue all of the Grubs

Gallery

Trivia

  • Occasionally the Knight will come across a Grub Mimic trapped in a glass jar that will transform and become hostile when freed. The easiest way to check is to Dream Nail them. Grubs will always say "...Home..." but Grub Mimics will say "...Kill...", "...Empty... " or "...Other...".
Grubfather2
  • Upon receiving the final reward(s) from the Grubfather, if the Knight rests at a bench and returns, the Grubfather will have swallowed all of the Grubs and is lying engorged on the floor. The Grubs' babbling can still be heard from inside him, indicating they are alive.
    • It is unknown whether this is a cruel act on the Grubfather's part or just a part of Grub biology. The achievement earned after turning in all Grubs is called "Metamorphosis," and the charm references a "Grubberfly" - this may imply that the Grubs have entered a larval stage for a butterfly-like creature with the Grubfather acting like a cocoon.
References
  1. Official manual: "Grubfather. Portly old Grub who bemoans his missing colony. His many children can be found strewn about Hallownest, [...]."
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