Benthic Giant

Hexproof on an otherwise blank body is the keyword stripped to its purpose at common: a creature that targeted removal simply cannot answer, paired with a frame big enough that the alternatives are uncomfortable too. The 4/5 matters more than the power suggests, because once point-removal is off the table the opponent is left with the awkward answers: a sweeper, a bigger blocker, or chump-trading into it turn after turn. That is the whole design, a wall-with-teeth that an opponent cannot interact with on their own terms and that slowly converts a stalled board into a clock. Six mana is the balancing weight. A body that does not evade, does not trample, and brings no card advantage is expensive for what it is, which keeps it pinned in the late-game-stabilizer slot rather than anything that swings a game on curve. The teaching value is real and deliberate: hexproof reframes the creature as a combat-math problem instead of a removal target. You stop asking how to kill it and start asking how to go around it or outlast it. Plain in the extreme, and plain on purpose.