Corruption Beyond Space

(You may cast a legendary sorcery only if you control
a legendary creature or planeswalker)
Target opponent mills cards until they mill two creature cards. For each land card milled this
way, create a 1/1 green Horror creature token
named Tentacle. For each noncreature, nonland
card milled this way, you gain 1 life. Put one of
the milled creature cards onto the battlefield
under your control.