The handiness of its ability to dig five cards deep and draw two cannot be overstated - especially for a deck like this where you need to look for combo pieces
A master of light and shadow with that Aethershield Artificer twinkle in the eye, those Goblin Researchers hands, and the bad ass attitude of Dovin's Veto and Fairgrounds Warden, his characters all have this feeling of being caught in the middle of something awesome, but pausing, for a sec, looking at you through the frame of the card and asking you to check out whats next
If you play an instant or activate an ability that makes you draw on an opponents turn and that drawn card has miracle, you can immediately play that card after the trigger if you can afford it and it has legal targets
Whenever one of these Penumbra creatures die, you create a black creature token that's the same creature type, power, and toughness as the dead creature
Otherwise, put it into your hand. Putting a card into your hand is nice, but you can literally win games by just combining Meren with Spore Frog, which you can sacrifice to prevent all combat damage for a turn - and only costs one mana