Eidolon of Obstruction doesn’t replace the loyalty cost of activating a loyalty ability or cause it to cost more loyalty to activate. It just adds a mana component to the ability’s activation cost.
24-01-2020
wotc
Loyalty abilities cost just {1} more to activate, no matter how much loyalty they cost to activate.
Random a card of Magic: The Gathering (MTG), but you can also roll the D20 dice, random a Planeswalker, have fun with the random rules and more.