It gives all creatures you control +1/+1 until end of turn for each experience counter you have, and all your cute little Eldrazi Spawn and Scion tokens will get indestructible and annihilator 1 (whenever a creature with annihilator attacks, the defending player has to sacrifice a number of permanents equal to the annihilator value)
It isn't so much ramp in that you won't get mana back out of it until you use it five times always paying the maximum life
As a Pokemon, it is awful, with being too slow, but as fodder for Regidrago, it gives it an attack that does 110 damage to three Pokemon
The fact that the attack isn't affected by weakness is perhaps a little disappointing, particularly as resistance remains unaffected
Heggen reassures me that they are thoughtful about what new Secret Lair cards are doing to strategies outside of Commander, saying we're not trying to accidentally ruin those formats by casually printing hyper-powerful cards into them. That said, the concept of mechanically unique Secret Lair cards existing at all has been a hot topic in the community regardless of power level
According to the sets official release notes from Wizards of the Coast, the battles serve as a thematic tie-in to the overarching story behind March of the Machine, where the cultist army of Phyrexians have launched their invasion of the entire multiverse
