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
In essence, the decks spells can be divided into various enablers, whether for emerge or delirium, and then a variety of different payoff cards with Emrakul, the Promised End sitting on top as the ultimate trump win condition
Below are some hands that Ive generated for pre-board games where I dont know what my opponent is playing: Hand 1 - Underground Sea, Badlands, Swamp, Lotus Petal, Animate Dead, Exhume, Unmask I would mulligan this hand on the play and the draw as you are missing an enabler and dont have a path to find it