Tiatom, War's Prince

If a creature has trample, Tiatom also has trample, the same is true for each of the following; first-strike, doublestrike, deathtouch, haste, indestructible, lifelink, menace, reach, and vigilance. At the beginning of combat on your turn, if Tiatom has 7 or more of the above keywords, creatures you control get +7/+7 until end of turn.