Wickerburn Idol

Scarecrow offering (You may cast this card any
time you could cast an instant by sacrificing a
Scarecrow and paying the difference in mana costs
between this and the sacrificed Scarecrow. Mana cost includes color.)
Your commander has Scarecrow offering.
When Wickerburn Idol dies, target opponent
loses life equal to the number of Scarecrows in
your graveyard.