Naatkinson and CancerMan are familiar with tikbalang because I play one in Naatkinson's Out Of The Abyss game. For the rest of you, here's a little taste of Filipino culture.
In Philippine folklore, the tikbalang are a race of half-man, half-horse: the body of a man with equine head, hooves, and tail. They are incredibly fast and immensely strong. Malevolent fey, they are tricksters, waylaying travelers who trespass on their domain.
Interesting tikbalang video:
https://www.youtube.com/watch?v=gRUSBSJ39KY
In First Foray, the tikbalang are noble warriors that live in the Bimari highlands. But at the moment all you know about this creature is what Urban glimpsed beyond the portal:
Quote:
A tribe of tattooed warriors with the heads, hooves, and tails of majestic horses locked in a desperate battle against a horde of goat-headed cultists. Over the battleground hovers a round portal etched with strange, glowing symbols...
So obviously this is developing into a hook to go to Bimar. It's entirely up to you if you will bite or not.