The Winnower

Reap— At your end step, sacrifice X flower tokens and exile X cards from the top of your library with a paracausal counter.

When The Winnower attacks, create 3 1/1 flower tokens and exile the top card of your library with a paracausal counter. This card may be played if its mana cost is less than the number of flowers under your control.

Partner with The Gardener
"In the evening, the winnower reaped the day's crop and separated what would flourish from what had failed."