Sirenorca (LVAL-EN041) [Legacy of the Valiant]

If you control a Fish-Type and a Winged Beast-Type monster, you can Special Summon this card (from your hand). If you do: Declare a Level between 3 and 5; the Levels of all monsters you currently control become the declared Level. If you activate this effect, monsters in your possession cannot activate their effects for the rest of this turn, except WATER monsters.