Morpha

Morpha cannot be damaged by creatures.
Creatures that Morpha blocks do not untap
during their next untap phase.

"... Looks can be deceiving. Morpha, for example, the
aquatic menace of the water temple, appears to be
made of water, but upon a (very unexpected) closer
inspection, I found it to be made of something else
entirely." - L.B. Terrus, Hylian Historian