Luc Boros Legend

Indestructible, hexproof, lifelink, vigilance.
Luc Boros Legend gets 4+1/+1 counters for every creature in play.
Luc Boros Legend gets 5+1/+1 counters whenever you play a spell.
Luc Boros Legends gets 3+1/+1 counters whenever you attack a block.