Then as we cast non-creature stuff, we can make one Ally of them 1/1 size - great in a Spellslinger style shell too - note that's not just sorceries or instants too
Getting to play cards off of the opponents library is good value, especially when any spells exiled to this ability can be cast for free
Even with just a single Drowned Secrets on the battlefield, something like Merfolk Secretkeeper (both the adventure and creature modes) into Callous Dismissal on Merfolk Secretkeeper into Merfolk Secretkeeper again ends up milling 18 cards for a total of six mana, making it a great way to close out the game once our opponent's library starts to dwindle
The most expensive ability, to create the 3/2 Shapeshifter, is the one thats easiest to skip when were getting low on life
Each creature has a power , representing the damage they can deal each turn, and a toughness , representing the damage they can take each turn