The 4e PHB lists three pacts that warlocks may take, and the Forgotten Realms guide lists a fourth. The pacts all seem relatively cut and dry. Infernal pacts are forged with devils, Fey pacts are forged with fey creatures, the Star pacts come from delving too far into the beyond, and the Dark pacts originate among the drow.
Planescape, however, opens up a whole new world of Pact options. The 4e PHB presents a somewhat narrow scope, although one any creative cutter can expand however he needs. But when you take the 4e warlock concept to the Planes, you open up a whole new Pandora's Box of options for warlock patrons that can work in the same four pacts.
So what other options do you see for warlock patrons in the Multiverse beyond the usual? Here are some I came up with, after Dunamin's post in my game thread (shameless plug: join my game!) really got my mind thinking.
Infernal Pact
- Efreeti - An efreet is a magical creature of fire and evil. They're close "friends" of the baatezu and share many similar outlooks on life. Their magical nature means they may be able to bestow fiery power upon mortals foolish enough to enter a pact with them.
Fey Pact
- Djinn, Marids, and Dao - Similar to the efreeti, all of the other genies are very magical beings, capable of great power. They're already able to bestow the occasional wish, but perhaps they can sponsor a mortal in exchange for some kind of service. Djinn would be more like a Seelie patron, while Dao would be decidedly nasty and wicked benefactors.
- Eladrin and Guardinals - These celestials, especially the eladrin, closely resemble the concept of good fair folk. They could empower mortals to fight for all that is good in the Multiverse and lay curses upon the evil in a manner similar to Fey Pact mechanics. "Infernal" powers used by this sort of warlock would manifest as cleansing, purifying fire instead of a vile blaze.
- Yugoloths - Yugoloths are like the darker fey: capricious, evil beings that enjoy making bargains and toying with mortals. Powerful 'loths may coerce foolish or arrogant mortals into their clutches in exchange for fell and mysterious powers. They would represent the decidedly darker aspects of the "fey pact" mechanics. A basher could likely make a similar case for tanar'ri as dark fey pact patrons, especially glabrezu.
Star Pact
- Pandemonium - Part of the point of the Star Pact seems to be that the warlock is not sure what he's summoning power from, and that power eventually drives him closer and closer to insanity. What better "patron" for such a warlock than the winds of Pandemonium? Such a warlock wouldn't actively seek out a patron (though some may exist), but would study how to harness the power of the winds and make it his own.
Ok - I adore this idea. I'm going to have to read up on the pacts idea and see what I can come up with.