Sliptide Serpent

A six-mana 4/4 sits below the curve for its slot, so the design has to earn the cost somewhere else: the self-bounce. The activation is the whole pitch. At instant speed, returning the Serpent to hand in response to a removal spell either dodges the answer entirely (the creature is gone before the spell would resolve) or strands an opponent's targeted removal with nothing left to hit. This folds the body into the broader blue tempo logic of its era: protect the threat, replay the same 4/4 when you have mana to spare, and refuse to trade your six-mana investment for an opponent's one-mana kill spell. What keeps the trick honest is the attached to the return. Bouncing is a real tax, not a free reflex, so the Serpent cannot loop indefinitely, and every reset costs you a turn's worth of tempo to recast. This is a school of blue creature design that asked the body to defend itself rather than asking the deck to hold up a counterspell: the protection is baked into the threat, not the support spells around it. The card trades raw efficiency for the privilege of being hard to kill with a single answer, and the open question the design wants you to keep answering is whether six mana plus a recurring bounce cost is a fair price for a body that refuses to die cleanly.