Concerted Effort

Enchantment, 2WW (4)
At the beginning of each upkeep, all creatures you control gain flying until end of turn if a creature you control has flying. The same is true for fear, first strike, double strike, landwalk, protection, trample, and vigilance.¹
Illus. Michael Sutfin

Crystal Keep Rulings Summaries

• It checks during each player's upkeep, not just your own. [D'Angelo 2006/05/13]
• Note - Also see Double Strike, Rule 502.28.
• Note - Also see Fear, Rule 502.25.
• Note - Also see First Strike, Rule 502.2.
• Note - Also see Landwalk, Rule 502.6.
• Note - Also see Protection, Rule 502.7.
• Note - Also see Trample, Rule 502.9.
• Note - Also see Vigilance, Rule 502.14.

Format Legality	Legal in Vintage, Legacy, Extended Banned in Standard
Printings (1/9)	Ravnica: City of Guilds (Rare)