Hearthpwn

For the mulligan with this deck, you want to keep call to arms egg, spikeridged if you also have egg in hand, stonehill defender and truesilver champion is a pretty key card in the aggro matchups answering vicious fledgling and henchclan thug ect...

Once you start going infinte with the undatakah the undertakahs deathrattles stack with each battcry so if you get 2 mechano eggs and immortal prelateon the first battlecry, then the next time you play it you play it you get 3 mechano egg deathrattles from the battlecry, then the undatakah will summon 5 8/8s when it dies and still shuffles into the deck because of prelate from the first battlecry.

if you are in a matchup where going infinite with undatakah actually matters, then be carefull of playing kangors endless army before you play undatakah and shuffle it for the first time, because if the battlecry hits 3 eggs and no prelate, then you cant shuffle it against like odd warrior.

If an egg gets silenced it still gets resummoned from kangors and undatakah will still gain its deathrattle so silence isnt the worst thing in the world, but polymorph effects and cabalshadowpriest can be hard to beat with this deck.