Taivym, Forest's Bane

Taivym, Forest's Bane costs {1} less to cast if you
control no swamps or forests.
Flying, trample
Whenever Taivym, Forest's Bane attacks, you
may untap it and remove it from combat. If you
do, Taivym, Forest's Bane deals X damage to
target creature without flying, where X is
Taivym's power.