R2-D2

As long as R2-D2 is on the battlefield, all
creatures you control have +2/+2 and Vigilance.
{w}{w}: Scry 1.
{t}{w}: Draw a card.
A smart, spunky droid serving a multitude of masters
over its lifetime, R2 never had a full memory wipe nor
has he received new programming, resulting in an adventurous and independent attitude.