She can double the triggers that we get off of our deck's leader, but won't do much else
It can't just stay undefined, so if Shellephant is going to be on the battlefield or something needs to know its power or toughness, you should activate the ability to define it
There are various types of sleeves available, including standard, inner, and matte options, and it's important to choose good quality sleeves for optimal protection and gameplay experience
The only means of getting rid of it is playing a card that'll wipe the board or prevent it from being summoned in the first place.
New cards that make clues or that are basically spells randomly tagged onto permanents that stick about make this option much easier
While Ruby/Sapphire has plenty of draw support in the form of the Talisman and the Huey, Dewey and Louie, those effects are more situational and less likely to benefit you