Legion Linguist

Sovereignty — When this creatures enters the battlefield, create a colorless Eagle artifact token
with "{2}, {t}, Sacrifice this artifact: Creatures you control get +1/+1 until end of turn."
{1}{t}, Sacrifice an Eagle: You gain 3 life and
draw a card.
"The other soldiers laugh and call my hobby a waste
of energy. In fact, my "hobby" has energized me
more than they will ever know."