Shimmer Dragon
{4}{U}{U}
Creature -- Dragon
5/6
Flying
As long as you control four or more artifacts, ~this~ has hexproof. (It can't be the target of spells or abilities your opponents control.)
Tap two untapped artifacts you control: Draw a card.
Whirler Rogue
{2}{U}{U}
Creature -- Human Rogue Artificer
2/2
When ~this~ enters, create two 1/1 colorless Thopter artifact creature tokens with flying.
Tap two untapped artifacts you control: Target creature can't be blocked this turn.