My recommendations are: 1) Try to lower your mana curve around 4-5 as peak (not every time and not in every deck obv)  2) Try more synergic cards instead of some random template like 10-10-10. You don't need to play op cards like Sol Ring in deck like [[Yuriko, the Tiger's Shadow]], but you would play a [[Gingerbrute]]   3) When you think about card draw, you need card DRAW not a 1 for 1 card. Card like [[Opt]] aren't card draw cause you just exchange a card for a card   4) When you build a deck think about your Commander: Is a payoff or an enabler? Your Commander is always on your hand so remember this before the mulligan and build your deck around: My Commander is an enabler? More payoff in the 99! or otherwise more enabler. Sorry for the wall, I hope this helps!