Jarvan IV, Exemplar

Health: 5, Level: 8
When Jarvan IV enters the battlefield, search your library or hand for a card called Demacian Banner
and put it onto the battlefield.
Levels 8-9: Whenever a minion you control attacks,
up to one target minion must block this turn if able.
Level 10: {w}{w}{w}{r}{r}{r}: Minions you control get +3/+3, haste, vigilance, trample, and menace until
end of turn.
Whenever one or more minions deal combat
damage to Jarvan IV, level up if Jarvan IV survives.