After discovering Caeneus was invulnerable to swords and spears, these creatures buried him under a pile (10[1])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 nymph Nephele. These creatures fought a namesake war with the Lapiths 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 heroes like Jason and Achilles and is named Chiron. For 10 points, name this race of mythical human-horse hybrids. ■END■