Great Oak Guardian

Oracle Text

Flash (You may cast this spell any time you could cast an instant.)

Reach

When Great Oak Guardian enters the battlefield, creatures target player controls get +2/+2 until end of turn. Untap them.

Card Rulings

11/4/2015 Great Oak Guardian’s last ability targets only the player, not any creatures. Creatures with shroud that player controls will be affected, for example.
11/4/2015 Any creatures controlled by the player that are already untapped will just get +2/+2 until end of turn.