These cards that cycle through your deck and replace themselves to stop you from thinning out your hand when you try to play a tonne of game actions in one turn and are the backbone of what are known as spellslinger decks
Assuming You Need to Read Everything For collectors, you need to read exactly zero Japanese to enjoy and evaluate your cards
TL;DR: If someone tries to draw extra cards, they either end up discarding and drawing, or milling instead, so they never actually go up on cards
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Remember when the shocklands were in Standard
While not as hard to find as it once was, the original printing of this card retains its vintage appeal, hence its over $20 price tag