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J4
Field J4 on Looming
Field Type Tome Chamber
Unlocked by J1
Unlocks V18
Tome Chamber Amplifiers
Available
gem types
OY
Rain/Snow % 0/0
Waves Reavers: 20
Giants: 8
Swarmlings: 14
Total: 42
HP 64 * 1.087/wave after first
Armor 36 + 4.18/wave after fourth
Buffs +80%/wave after wave 5

Field J4 is obtained by completing Field J1 in Gemcraft Chapter 2 on Looming difficulty. To open the tome chamber on this field, you must kill 216 cursed monsters within a range of 7. The guaranteed gem types available for this field include Mana Leeching and Critical Hit. There are 42 waves on this field and one achievement exclusive to it.

Starting OutEdit

Player Buildings Other Buildings
Amplifier ×3 Shrine of Time (Charge: 200s)
Shrine of Energy (Charge: 200s)
Haste Beacon (HP: 3,000; Armor: 30; Range: 7) ×2

WavesEdit

The following table applies only to Looming difficulty with no battle traits.

Wave Monsters HP HP Regen Armor Speed Mana Gain Banishment Cost XP Buffs
1 10 Reavers 64 59 36 0.87 / 1.57 24 48 4
2 12 Reavers 70 61 36 0.87 / 1.57 25 50 4
3 19 Reavers 76 63 36 0.87 / 1.57 27 53 4
4 11 Reavers 82 65 36 0.87 / 1.57 28 56 4 / 5
5 14 Reavers 89 67 41 0.87 / 1.57 29 59 5
6 4 Giants 3,030 70 63 0.22 / 0.4 95 189 6
7 37 Swarmlings 20 73 26 1 / 1.8 8 16 3
8 15 Reavers 115 75 48 0.87 / 1.57 34 69 5
9 4 Giants 3,905 78 75 0.22 / 0.4 107 214 7
10 9 Reavers 136 81 57 0.87 / 1.57 37 74 5
11 14 Reavers 147 83 65 0.87 / 1.57 39 78 5
12 50 Swarmlings 30 87 42 1 / 1.8 10 20 4
13 44 Swarmlings 33 90 47 1 / 1.8 11 21 4
14 15 Reavers 189 93 69 0.87 / 1.57 43 87 6
15 32 Swarmlings 39 97 46 1 / 1.8 11 22 4
16 54 Swarmlings 42 100 59 1 / 1.8 12 23 4
17 9 Reavers 243 104 94 0.87 / 1.57 48 97 6
18 48 Swarmlings 49 108 52 1 / 1.8 12 25 4
19 54 Swarmlings 54 112 55 1 / 1.8 13 26 4
Spark: Unearthed Shard
20 56 Swarmlings 58 116 64 1 / 1.8 13 26 4 / 5
21 14 Reavers 339 120 89 0.87 / 1.57 55 109 6
22 14 Reavers 369 125 87 0.87 / 1.57 56 112 6 / 7
23 3 Giants 16,702 130 165 0.22 / 0.4 172 344 9
24 54 Swarmlings 82 135 56 1 / 1.8 15 29 5
25 3 Giants 19,743 140 188 0.22 / 0.4 181 361 9 / 10
26 10 Reavers 515 145 147 0.87 / 1.57 62 123 7
27 4 Giants 17,494 151 169 0.22 / 0.4 191 382 9 / 10
28 11 Marked Reavers 609 157 155 0.87 / 1.57 65 130 8 Burns 4.6% of total mana when banished
29 8 Reavers 662 163 168 0.87 / 1.57 67 133 8
30 57 Marked Swarmlings 134 169 119 1 / 1.8 17 34 5 +32 extra armor
31 25 Swarmlings 146 175 102 1 / 1.8 17 35 5
32 7 Reavers 850 182 189 0.87 / 1.57 71 143 8
33 39 Swarmlings 173 189 87 1 / 1.8 18 36 5
Spark: Touch of Wisdom
34 7 Reavers 1,004 197 203 0.87 / 1.57 74 148 8 / 9
35 32 Marked Swarmlings 204 204 76 1.85 / 3.33 19 38 5 ×1.85 speed
Spark: Prism Cascade
36 51 Swarmlings 222 212 108 1 / 1.8 19 39 6
37 16 Reavers 1,290 220 164 0.87 / 1.57 79 158 8
38 4 Giants 43,797 229 224 0.22 / 0.4 242 483 11
39 18 Reavers 1,524 238 155 0.87 / 1.57 82 164 8 / 9
40 4 Giants 51,731 247 297 0.22 / 0.4 250 500 12
41 3 Twisted Giants 74,973 257 225 0.42 / 0.75 254 508 11 / 12 ×1.88 speed
Drops 3 spawnlings when killed, having 6,003 hit points each
42 7 Reavers 1,957 267 229 0.87 / 1.57 87 174 9

AchievementsEdit

Achievements exclusive to Field J4 include:

  • Don't use any gem enhancement spells.

CompletionEdit

The player receives the following drops upon completing this field:

In addition, if the player opens the tome chamber, they will get the following drops:

  • The Amplifiers skill tome

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