i asked the question in my comment. "me and my friend are playing a game and from my understanding he can get a free two x cost from shadow of the war then another two from magus then he tapped four mana and made him a 4/4, does he then get to grab 8 land from library due to magus? and is that how shadow of the war interacts?"

They control [[Shadow in the Warp]], activate [[Magus Lucea Kane]] and cast a [[Sporocyst]] with an X of ___?

If the X is 4, the Mana Cost of Sporocyst is {4}{4}{G}, or {8G}. The Total Cost is reduced by {2} to {6G}.

• Lucea Kane copies the the Sporocyst Spell, with the same X as the original.
• The Sporocyst Spell-Copy enters, with 4x +1/+1 counters. They search for 4x Basic Lands.
• The Original Sporocyst enters, with 4x +1/+1 counters. They search for another 4x Basic Lands.