You can exile it temporarily by discarding three cards, which can help protect it from lethal combat damage, removal, and lots of other horrible, no good, very bad situations
Another thing I really like about this ability is that it scales up over time, meaning it gets stronger the later in the game it is, because you tend to have more mana
Jack was desperate to get his hands on something, anything really
Hexproof or indestructible are on the higher end of that spectrum
While having no cards in hand seems troublesome, several support Pokmon are here to draw cards on the next turn to help Granbull achieve its next attack
Chained to the Rocks 4/10 Presently with just lands you can get a maximum of 9 cards that will allow you to play this turn one (seven sac lands, Plateau and Sacred Foundry) in a singleton cube