Wormwood Treefolk

A landwalk creature that buys its own evasion in life, and the price is steep enough to read as a design experiment rather than a finished engine. Most early landwalk granted the keyword statically or hung it on the color you were already playing; the trick here is the second mode. Forestwalk costs green, which a green deck produces by default and which lets the creature sneak past mirror-ish opponents. But the swampwalk mode demands black, a color this creature's own home does not supply: the card is built to want a two-color manabase it gives you no reason to run. That tension is the whole point. It is a creature that gets through, but only against opponents whose lands happen to match, and only by burning down your own clock to do it. The 4/4 body is large for its moment, which softens the math somewhat (you are paying life to push a real threat, not a chip-shot), but the self-damage is capped by nothing except your willingness to keep attacking. It belongs to the era when evasion was something a creature paid for rather than something it simply had, and when "deals damage to you" was an honest counterweight rather than a flavor footnote. Its ceiling sits genuinely high; its floor is a five-mana 4/4 that wants colors it cannot guarantee.