Target creature gains flying until end of turn. Untap it.
"The edges of the Quicksilver Sea run dark with the spread of the Mephidross. Two more aerial passes before I can be sure what I'm seeing . . ." —Lafarius, Neurok sky agent
2011-01-01
For flying to work as an evasion ability, Vault Skyward must be cast before the declare blockers step begins. Once a creature has become blocked, giving it flying won't change that.
2011-01-01
Vault Skyward can target any creature, including one that already has flying or is already untapped.