Cryogen Relic Like Ichor Wellspring meets Think Twice/Deduce, its a way to effectively cantrip for 2 and to potentially another by cashing it out or sacrificing it for free, the latter of which we have seen with cards like Umbral Collar Zealot

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While the two first modes speak for themselves and would already constitute a strong magic card, the last mode is more format dependent and as it stands, it is a very effective ability in the current Modern metagame
If either of these things isn't true, the ability does nothing
The Champion playmat will feature Daisy Duck, but we havent seen that quite yet
Krydle can also help with graveyard steal by milling cards into the graveyard every turn, and can trigger life steal effects from cards like Sanguine Bond and Exquisite Blood