I voted bad. I think the card is to expensive, too conditional and to weakly statted to see play. Sure, a full board of big minions sounds tempting, but how is anyone reliably going to be able to survive until turn 10 with enough big spells and this guy in hand to even play it? Not to mention the inevitable boardclear the turn after. Filler legendary and Conjurer's calling nerf, IMO.
wait, is this broken in paladin ? play that card that switches a minions cost with a spell.
best case you play a 1drop 5/5 that summons at the very least 1 10 drop
Probably not broken, but it definitely seems interesting in Paladin right now as their Spirit directly incentivizes big spell plays. There's a very natural synergy there.
I'm mostly imagining this as a late-game panic button in a Token Druid deck; Token Druid runs a lot of big spells (Will run more with Overflow in the game) and has relatively few minions in their deck, so 4-6 'tokens' coming out on playing King Phaoris of small-to-large body size is actually fairly likely.
Would be interesting to get smacked in the face with something besides squirrels, wisps and trees for once by a Token Druid.
Well THAT is an interesting legendary effect. Not just slamming keywords onto stats like Colossus of the moon.
In terms of viability this seems kind of wonky, because of the high RNG factor. Also: how many (expensive) spells can you realistically hold in your hand until turn 10 without losing the game in the meantime? Probably not more than 2, maybe 3. And even if it goes off it's not necissarly game winning. Stuff like Hir'eek says hello!