Lodestone Golem
Artifact Creature — Golem
Nonartifact spells cost 
more to cast.
"Somehow it warps the Æther. It brings a strange weight, a blockade in the flow of spellcraft." —Noyan Dar, Tazeem lullmage
Chris Rahn
Modern Masters 2015 (MM2)
• #219Rulings
When determining a spell's total cost, effects that increase the cost are applied before effects that reduce the cost.
(wotc • 2010-03-01)
The ability affects the total cost of each nonartifact spell, but it doesn't change that spell's mana cost or mana value. The extra mana also doesn't change how many times you kicked the spell or what the value of X is (if applicable).
(wotc • 2010-03-01)
The ability affects each spell that's not an artifact spell, including your own.
(wotc • 2010-03-01)
Rulings
When determining a spell's total cost, effects that increase the cost are applied before effects that reduce the cost.
(wotc • 2010-03-01)
The ability affects the total cost of each nonartifact spell, but it doesn't change that spell's mana cost or mana value. The extra mana also doesn't change how many times you kicked the spell or what the value of X is (if applicable).
(wotc • 2010-03-01)
The ability affects each spell that's not an artifact spell, including your own.
(wotc • 2010-03-01)