Hearth Tech, 170 Deathwarden doesnt work

1. Imprisoned Celestial copied by Mirror Entity cannot trigger its Spellburst 2. Zai, the Incredible doubles C Thun enchantments 3. Keywarden Ivory cannot discover dualclass spells of Darkmoon Races 4. What happens when Rivendare dies with minions with Deathrattle 5. What happens when Deathwarden dies with minions with Deathrattle 6. Sometimes Deathrattle works when Deathwarden is in play Tested in Patch