Aerie Mystics
{4}{W}
Creature -- Bird Wizard
3/3
Flying
{1}{G}{U}: Creatures you control gain shroud until end of turn. (They can't be the targets of spells or abilities.)
Plaxmanta
{1}{U}
Creature -- Beast
2/2
Flash
When ~this~ enters, creatures you control gain shroud until end of turn. (They can't be the targets of spells or abilities.)
When ~this~ enters, sacrifice it unless {G} was spent to cast it.
Tortoise Formation
{3}{U}
Instant
Creatures you control gain shroud until end of turn. (They can't be the targets of spells or abilities.)