for 3 cmc, give deathtouch & lifelink to all your creatures (making a huge attack that swings life points both ways or an amazing block trading off some stuff)
This draws you 7 cards, loses you 7 life, since that's the mana value of Atraxa, Grand Unifier
There are also powerful variants such as Pokemon EX, GX or V, which are stronger but give more prizes when defeated
A powerful monster could take advantage of Blue Flame Swordsman effect to deal massive amounts of damage to its user
Combining effects that stack the top of your deck like Brainstorm and creatures with powerful effects like Muldrotha, the Gravetide and the new Conspiracy Unraveler can create some massive value alongside The Master
I think this is going to be able to claw back some games