It can be targetted by spells and minions, can also be silenced when a good chunk of the popular decks are using Silence, I'm not sure this would work. It doesn't do anything the turn it comes into play other than pass the turn. As much as I love Tyrantus, the card is not good. This one is the same way.
At least compared to Tyrantus this one would automatically win you the game if it survived for one turn, and it didn't get silenced, and the opponent didn't kill you because you spent the full turn doing nothing. Also, if the opponent doesn't put anything in the way that you don't deal with.
Meh, I prefer Malygos + Swipes + Moonfires + Living Roots with Aviana and Kun. Killing the opponent tends to be better than making a huge minion because if you kill them they are dead, if you make a huge minion the minion can never get to attack...
This thing is gonna be like 20/20 minimum when it drops on board, an additional effect would be massively OP. The fact that it can be silenced is a small price to pay considering Priest is the only class to often runs silence. It's basically OP as is, whether or not it would see play is another matter as the 10 mana spot is a tough one to fill.
Not playable. Tonnes of silenceable stats is way too weak. Generally, vanilla stat minions stop being good already on turn 5 (Bittertide Hydra), from turn 6, synergies, impact and additional effects is what matters.
As a rule of a thumb, no 10 mana card that doesn't do something turn it's played is any good.
*cough* Deathwibg Dragonlord *cough*
Ysera, Malygos and some others also fit the category, but they all have very strong additional effects. The vanilla big guys are all pretty horrible, and this would be pretty weak. I am not sure if even a vanilla 100/100 minion for 10 would be viable.