Jejer, Kobold Bargainer

Jejer, Kobold Bargainer is unblockable.
Whenever Jejer, Kobold Bargainer deals combat
damage to a player, gain control of target land that player controls until their next end step. That
player gains life equal to the number of lands you
do not control.
At the beginning of your end step, all opponents
lose life equal to the number of lands you control
and do not own.
{2}{u}{b}: Gain control of target land an opponent controls until the next upkeep. Exert it.