Crystal Boon →Used Deck

① He has the effect of summoning up to 2 "Crystal Beast" monsters in the Spell & Trap zone, the effect of summoning Special Summon, and the pseudo search or recruit effect when the "Crystal Beast" card of ② is placed in his Spell & Trap zone, all Excellent... not.
First of all, regarding ①, he is characterized by being able to Special Summon "Crystal Beast" actively during the opponent's turn. However, 《Awakening of the Crystal Ultimates》, which appeared in the same Strak, can be Special Summoned from a wider range, including the Spell & Trap zone, and it is a Quick-Play Spell, so it can be used during your opponent's turn. With two Special Summons, this one looks stronger in numbers, but if he Special Summons one Ruby Carbuncle, he can also Special Summon "Crystal Beast" in the Spell & Trap zone. , I don't think the numbers mean much.
As for ②, he can't function without "Crystal Beast" at the top of the deck, and must be used in combination with Cobalt Eagle to make sure. However, I don't think it's a combo that you want to use that much because the effect over there is hard to use due to the add loss. It's a different story if it's a combo that is essential for some deployment route, but I don't know at the moment.

When I read the effect for the first time, I thought he was a spell, but it was a trap
If the opponent's turn has no meaning, I want to do it during my own turn, so there is no value in existence.
There is also a mysterious deck top effect of him, but there is no meaning other than the development side's feeling of "I made it with synergy with Eagle!"
What was this card born for?

Cobalt Eagle "It's a good card for me!"
Ah yes.
The first half of the effect is simply to Special Summon the Crystal Beast from her Spell Trap zone and heal you for good. It's a very easy effect to use up to 2 copies, but since it's a trap, it's naturally delayed by one tempo.
By the way, Special Summon and recovery are processed at the same time, so 《Crystal Beast Sapphire Pegasus》etc. can be used without missing the timing. Well, if you chain it to the opponent's removal, you will of course miss the timing, but... be careful.
The effect in the second half is an effect that may gain an advantage by referring to his Deck top. Rather than relying on strange things, it's better to operate with a feeling of being lucky if you hit it.
Versatility on the Cobalt Eagle side that can be comboed with 《Crystal Beast Cobalt Eagle》? I don't know, but I might be hired...
I think the effect itself is strong, but I'm really worried that Pegasus will miss the timing if I chain it to a face-down removal.