Unity is running big discounts through the Unity Asset Store until May 15: 55% off select bundles, discounts on more than 350 individual assets, and a daily special with 70% off a new asset every day.
The May 1 daily special is 70% off Buried Memories: Yggdrasil, a world-class fantasy pack that includes character models, animations, an environment, music, sound, cinematic camera and timeline, source files, a trailer, and concept art.
You can see the full announcement at the Unity Blog here.