Последний патчноут линк на воввики Warlords-Logo-Small Patch 6.0.2 (14-October-2014): Conversion no longer has an initial tick, and now costs 30 Runic Power/second for Blood, 10 Runic Power/second for Frost, and 20 Runic Power/second for Unholy
http://wowwiki.wikia.com/wiki/Conversion пруф