If the target opponent is an illegal target as Susurian Voidborn's first ability tries to resolve, it won't resolve and none of its effects will happen
When analysing Brainstorm, most people talk about its relationship with fetchlands like Polluted Delta
Its a perfect trump card against strategies that rely on building tall creatures
It can be tapped to add a Burden counter, causing the player to draw a card for each Burden on it
If it is ungraded, how hard it is to grade a copy and be able to potentially get a high grade to maximize value
Reiki, the History of Kamigawa draws you cards, Garruk, Caller of Beasts helps you find creatures, Captain Sisay tutors for legends, Chief Jim Hopper creates Clue tokens to help you draw cards, and Old Gnawbone gives you Treasure tokens