Witchwood Spiteful Ysera Control Priest

This Spiteful Summoner  Deck has been mildly enhanced by the Witchwood expansion. 

I have kept both Free From Amber  and Mind Control “big spells” for the summoner to generate big minions early(ish) in the game. 

 Ysera is my replacement for the now wild Medivh, the Guardian.  The bonus cards from Ysera can be helpful when things get sticky, and as a dragon it can also enable both  Twilight Acolyte and  Duskbreaker in the early game.

I will probably redo this deck and make better use of Squashling in combo with Nightscale Matriarch. With 10 mana you can generate a lot of healing, squashlings, and whelps.

Priest Spiteful Ysera Dragon Control Deck Strategy & Mulligan Guide

Priority Keeps (any deck)

• Northshire Cleric – I tend to play this early only against fast decks, but she’s very useful and with damaged minions and only 3 mana left that gives you a guaranteed extra card even in the late game.
• One dragon – even if not handy now, keeping one dragon can be either played later or used to trigger the battlecry of the other cards.  If you have a Duskbreaker it’s probably worth dropping anything else and trying to mulligan another dragon.

Priority against control / slower decks

• Spiteful Summoner is playable on turn 6 (or 5 with a coin), you get a bonus 6+ cost minion (yes, it’s random).  If you are lucky it quickly becomes game over, and even if not your 2 minions for the price of one have to be dealt with.
• Squashling  won’t hopefully get used too soon, but by 8 mana can fill the board with nasty squashlings and generate quite a bit of health.

Priority against fast / aggressive decks

• Duskbreaker provides some useful minion clearance.  If possible, leverage your  Netherspite Historian to generate another one or two of these, to survive future waves.  This only works of course if you held onto another dragon (or one turned up).
• Tar Creeper has good defensive stats unless silenced, which is particularly useful in the early game.  Offence is weak, but can be buffed up nicely with a Cobalt Scalebane. 

Always Replace

• Any of the big spells (Mind Control and Free From Amber). With fast decks you are unlikely to use them unless you have already survived the initial onslaught, and you want the Spiteful Summoner to trigger a big minion early .  With control decks you might get a chance for a double benefit:  1st with Spiteful Summoner, 2nd with the actual effect of the cast itself.

Card Substitutions

Spellbreaker and Ironbak Owl provide a useful silencing service, but as a priest you could keep a free silence spell which provides earlier use at the expense of not leaving a minion behind to mop up.

Shadowreaper Anduin without Raza and cheap spells is really useful only to eliminate high attack minions and to buff armour (once).  It has saved my bacon enough times for me to keep it in this deck, but you might prefer to add Nightscale Matriarch and with the squashling card get a lot of small minions and health buffs for 8 to 10 mana.  

Confession

I’m not a Legend player, and don’t aspire to play enough games to get there.  You might have other ideas, and I do believe this deck will get you there with the usual caveats (time, talent).