At the beginning of each upkeep, creatures you control gain flying (This creature can't be blocked except by creatures with flying or reach.) until end of turn if a creature you control has flying (This creature can't be blocked except by creatures with flying or reach.). The same is true for fear (This creature can't be blocked except by artifact creatures and/or black creatures.), first strike (This creature deals combat damage before creatures without first strike.), double strike (This creature deals both first-strike and regular combat damage.), landwalk (This creature is unblockable as long as defending player controls a land of the specified land type.), protection (A permanent or player with protection can't be targeted, enchanted, equipped, fortified, damaged or blocked by sources of the given property.), trample (This creature can deal excess combat damage to the player or planeswalker it's attacking.), and vigilance (Attacking doesn't cause this creature to tap.).