The Ancient Dahl

As long as you have more than fifty cards in your library, The Ancient Dahl isn't a creature.
Effects that remove The Ancient Dahl from play,
returns him to the battlefield instead.
The Ancient Dahl has Shroud.
Damage to players can't be prevented.
As long The Ancient Dahl is a creature, spells
can't be countered, and cards can't be discarded.
If The Ancient Dahl is a creature, all
sources have trample.