A neat list showing the total mats needed for each stage, and in total for making and upgrading the Undine pet.
Step 0
You will want to have the following ready for fixing your alchemists up after the initial Undine craft:
1 Phoenix Feather
25 Iron Bars
30 Holy Water
50 T2 Materials, of the same element (Iron Bar for neutral) as your second alchemist (The one you don’t finish the craft on.)
Before you finish this step, your main alchemist (The one you finish the craft on) will have it’s alchemy speed halved, and the other one will be rendered incapable of doing anything, even eating, until fixed.
The below guide lists the costs for just the Undine, these mats are not taken into account.
Step 1
30 Nevermelting Ice
1 Shadow Essence
1 Phoenix Feather
Step 2
160 Nevermelting Ice
7 Shadow Essence
15 Phoenix Feather
10 Holy Water
10 Ice Block
Step 3
5 Magic Fire Stone
2 Shadow Essence
25 Melting Bombs
5 Torches
2 Phoenix Feather
Step 4
5 Magic Fire Stone
5 Magic Wood
5 Magic Ore
5 Magic Feather
470 Nevermelting Ice
24 Shadow Essence
50 Magic Herb
45 Phoenix Feather
20 Holy Water
20 Ice Block
Step 5, The Final and Steepest of Steps:
25 Magic Fire
25 Magic Wood
25 Magic Ore
25 Magic Feather
970 Nevermelting Ice
29 Shadow Essence
300 Magic Herb
95 Phoenix Feather
20 Holy Water
20 Ice Block
Sum
35 Magic Fire Stone
30 Magic Wood
30 Magic Ore
30 Magic Feather
1 690 Nevermelting Ice
63 Shadow Essence
350 Magic Herb
158 Phoenix Feathers
25 Melting Bombs
5 Torches
50 Holy Water
50 Ice Block