Just unlocked.
Talk to him in Jeuno and trade him 100,000 gil, he then asks for an elixir or high-elixir. Not sure how this effects his interaction as a trust, but definitely related.
When he's summoned he makes mention of the donation and the elixir.
Uses a variety of Mix Potion spells:
Max Potion: 500hp-700hp cure
Mix: Dragon Shield - Magic Defense bonus buff for ~1min
Mix: Panacea-1 - a panacea, removed a debuff
Mix: Dark Potion - did 666 damage to enemy target
Mix: Samson's Strenght - all attr. stat bonus (+10~, 60s duration)
Mix: Guard Drink - protect/shell for ~4min (~450 defence potency)
Mix: Life water - Aoe Regen (20hp/tick)
FYI, didn't trade any gil or elixirs and he's still able to do all the above.
Samson's strength lasts for 60 sec.
Mix: Elemental Power gives a MAB boost for 60 sec.
Mix: Vaccine removes Plague.
And he'll literally spam panaceas on your group. No recast, no delay.
Thank you for this information! Sounds like soloing Yumcax got that much easier.
Sounds like Mon. is totally worth the grind. See ya in 5 months!