After discovering Caeneus was invulnerable to swords and spears, these creatures buried him under a pile of tree trunks and stones. One of these creatures named Pholus opened one of their sacred wines for Heracles. In one origin story, these creatures were fathered by Ixion (“ick-SIGH-on”) with the cloud (-5[1])nymph Nephele. These creatures fought a namesake war with the Lapiths (10[1])of Thessaly. A wise one of these creatures gave up his immortality in exchange for Prometheus’s freedom after being struck with a poisoned arrow. That one of these creatures trained (10[1])heroes like Jason and Achilles and is named Chiron. For 10 points, name this race of mythical human-horse hybrids. (10[1])■END■