What it does
"Survey the Realm" isn't a standard Magic keyword or evergreen ability—it's not part of the official rules glossary, and you won't find it printed on real cards. It may be a custom, homebrew, or fan-made mechanic, or possibly a misremembering of a similar-sounding ability like "Surveil" or "Explore."
If you meant Surveil, that lets you look at the top N cards of your library, then put any number into your graveyard and the rest back on top in any order—great for graveyard synergies and card selection. If you meant Explore, a creature reveals the top card: if it's a land, you draw it; otherwise it gets a +1/+1 counter and you choose whether to keep or bin the card.
Double-check the exact card text, since a made-up ability has no enforceable rules. If this is a Mythicwyrm-specific custom mechanic, consult that platform's documentation for its precise wording and interactions.
