Deep Sea Guard, which would likely just kill the 2AP ally when blocking against it; still, it can help you bide your time to get out of a sticky situation. Also, if you need as many cards as you can on the field, Water Ball combined with Develop or Grow Big can be a big help.
Strong against: low-stat allies that need to be defended against, over and over.
Weak against: ally-heavy decks, high-stat allies.
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