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
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
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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
Within 2 activations, you are already drawing 3 cards, which is already an amazing amount for a mana investment of 4 mana