Talk:Hidden Powers/@comment-24877796-20140520061058/@comment-24850617-20140520062408

Well, for event spirits, you can farm them so it's easy to get multiple copies.

The most efficient way is as follows.

1. Unlock all the hippos of the base card, for example, Ayda (Spear Warrior) has 2 hippos at base evo, so 3 aydas are needed, 1 base and 2 for hippo unlocking.

2. Evolve the card. (for cannibals like ayda, that requires another ayda)

3. Unlock all the hippos of the resultant card.

4. Evolve the card.

5. Repeat steps 3-4 until max evo rank and max hippos unlocked.

In this manner, you use the least amount of the gold and exp to unlock the hippos.

e.g. Pino Marianne (Dancer of the Snow) has 5 hippos. If you unlock all 5 hippos on her, you need 5 S pinos. which require lots of gold and exp. But if you unlock the hippos as you evolve a rank A pino, you end up spending less gold and exp as you do not need to evolve all the 5 pinos to S rank, but you still need 5 Rank A pinos no matter what.

The efficiency is greater for cannibals, in that you require less copies of the base card to unlock all hippos. Hope that answers your question.