There are 4 event bosses with the Ostara 2015 event. Level 50 Goil the Marauder in Fingal's Cave North of Twisted Tunnels Leystone across the bridge. Level 100 Smoidrich the Destroyer in Fingal's Cave in the Southernmost part of Loch Dorcha. Level 150 Garyn the Devastator in Carrowmore Tunnels in West of the Fiana Camp leystone. Level 200 Smolach the Annhilator in Lir's Reach at the stone circle.