Lil' Karn, the Lonely

: As long as you control an artifact or colorless Planeswalker, the cost of Lil' Karn's loyalty ability becomes -4.
: When Lil' Karn enters the battlefield, tap all lands you control. Then untap all tokens and artifacts you control.
-8: Create a 5/5 colorless construct artifact creature token. Lil' Karn deals 4 damage to you.