Yolm, The Meditator

when a land enters the battlefield search your
library for a land and put it into play tapped
{u}{u}{u}: Copy target ability
{r}{r}{r}: Yolm, The Meditator deals damage to
each opponent equal to the number of lands you
control
If Yolm, The Meditator would deal damage to a
player that damage is commander damage