I like those synergies!

Opponent's stuff has to attack, then the following turn you sweep the tapped ones for 3 damage. And the other walker turns two guys into 0/3s with no abilities? Takes some setup but that sounds devastating.

Also, Will can make Rowan cost 2 less to cast. That's value. The fact you can constantly threaten her down tick makes attacks difficult.

Then of course, Rowan's ultimate makes all further walker abilities doubled. So now, you're doing 6 damage or hitting multiple players. Or drawing 4 cards with Will and taking two commander taxes off Rowan.

I really like that Will can down tick to kill himself and then recast on the cheap(ish).