Carnivorous Plant

A vanilla wall with a number stapled on, and the number is the whole story. Four mana for a 4/5 that cannot attack was a rate early design handed out freely, back when these creatures carried the type "Wall" and its inherent rules baggage: a creature that simply could not attack, no keyword needed, because the type itself did the work. Defender is the keyword that came later to absorb that baggage and let "Wall" become flavor rather than a rules engine. The body is genuinely large for its era: a 5-toughness blocker that survives most of the burn and creature combat of its day, and a 4 power that punishes anything trading into it. But the lack of any text beyond the keyword is what dates it. There is no ramp clause, no reach, no incidental ability to justify keeping a do-nothing blocker on the board past the early turns. This is green's answer to the question "how do I not die before my fat creatures arrive," answered with raw stats and nothing else. The design lineage that followed (Wall of Roots, Sylvan Caryatid, the long tradition of walls that mana-fix or accrue value) exists precisely because cards like this proved that a blocker which only blocks runs out of relevance the moment the board stabilizes. It belongs to an earlier assumption now abandoned: that a 4/5 was big enough you did not need to ask it to do anything more.