Anurid Murkdiver

Swampwalk is the oldest evasion in the game, and it has always carried the same structural flaw: it only works when the defending player controls a Swamp. This 4/3 leans on that keyword and nothing else, which makes its reliability a question your opponent answers, not you. Against a player with a Swamp, it is an unblockable four-a-turn clock; against anyone who never plays a Swamp, it is a vanilla body that costs more than it should and dies to most things. The Zombie Frog Beast typing fills in the rest of the story: this was built as a creature-type-matters body for a tribal-heavy era, where the evasion was a conditional bonus stapled to a curve-filler rather than the reason to run it. Landwalk of this period was largely a mirror-breaker and a tribal-fixing afterthought, an answer to the narrow question "how do I attack through a black opponent's defenses" that almost no constructed deck ever needed to ask. The design has aged into a curiosity precisely because the one keyword it depends on is the one whose payoff is decided entirely by someone else's manabase. Black has plenty of evasion that does not ask permission from the opposing color; this is the cautionary version, the reminder of how much weaker landwalk gets the moment you cannot guarantee the land it walks across.