Monstrosity of the Lake

The pay- entry clause is a rare thing in blue: a hard board freeze that neutralizes an entire opposing side without touching your own. Tapping is temporary, but the stun counters are what give the effect teeth, delaying every affected creature's next untap step by a full turn. Against a wide field, that is a Sleep effect stapled to a permanent, and the permanent stays: a 4/6 body that survives long enough to matter after the tempo swing lands. The design is honest about its cost. The freeze is not free (it wants five extra mana on top of the five to cast the creature), so the card is built for the point in a game when mana is no longer the constraint, then rewards you for reaching that point with a one-sided reset that opens the door for an alpha strike. The cycling suite underneath is the concession that keeps the card from being dead early: when the ten-mana turn is nowhere in sight, it converts into an Island tucked straight into your hand, smoothing the manabase you need to reach that turn in the first place. That split identity, a game-ending payoff on one end and land-fixing on the other, is what lets a blue-based control shell run it without hedging its bets on drawing it at the right moment; a dead card early becomes a fetched Island, and a live card late becomes a board full of stunned creatures.