New druid ramp legendary idea start of game concept

make a 5mana 5-6 minion for druid, with this description.

Star of Game: If your deck has no Neutral cards, upgrade your Hero Power.

Hero power type: 0m passive.
Upgraded power description: If you end your turn with any unspent mana, add a coin to your hand for each mana not spent.

I was thinking you could do nothing for a few turns then pump out some big minions, either way I had to post this idea when it came to me hope the community finds the concept entertaining

That’s a bad idea. That would mean if you’re going second, you can play a Nourish at turn three.

theres a 2m draw 5 cards in mech pally and turn 3 overgrowth was already a thing. Im sure there would be some other crazy combos tho. keep in mind you’re not doing anything for a couple turns and theres a lot of agro in the meta.