Worlds of Magic: Planar Conquest (UP)

I tried to get this trophy several times with many failures along the way. I will list the exact steps that I did when I finally unlocked it:

1. Start up a new game in any single non-Fire plane with countless Features.
2. Your Faction must be High Men.
3. Use a custom Sorcerer with full points in Earth + Earth Mastery.
4. Take some penalties so you can learn the Cartographer, Planar Cartographer and Omniscient perks.
5. Start the game then inspect every Fire Node on the map.
6. Look for a Fire Drake. I tried killing a Doom Drake, Sky Drake and Dracolich and none of them popped the trophy. I did notice later on that the trophy icon is definitely that of a Fire Drake too.
7. If you do not see a Fire Drake then keep restarting new games until you do.
8. Start learning Earth spells immediately and keep researching until you eventually can learn the Tier V Web spell.
9. Since this trophy is a pain I recommend not doing anything else; just leave your army in your city and upgrade it enough that you are not losing resources.
10. Once you learn Web, create 6-10 Archers and then a couple of Settlers. You should already have 1 Cleric from the beginning of the game too.
11. Head to the Fire Node to fight the Fire Drake.
12. Note: Every single time that I failed to get this trophy I had extra damage attacks on my Settler's melee. When I unlocked the trophy I had no extra damage attack so that is what I recommend. I mention this because it is possible that you must kill the Fire Drake with a regular non-elemental Settler attack.
13. Start the battle.
14. Use the Cleric to cast Bless on both Settler units.
15. Try to take the Fire Drake's life down to less than 10 hit points using your Archers. If you accidentally kill it, then reload your game save and try again.
16. Once the Fire Drake advances all the way forward and is in rage of the Settlers, cast the Web spell on it.
17. Try to have the Settlers attack the Fire Drake during all 3 rounds where Web is applied. It is difficult for a Settler to land a hit and even if he does, it will be a low amount.
18. For me the trophy popped immediately after killing a Fire Drake with a regular Settler attack (not a counterattack).