Ioreth of the Healing House does not have summoning sickness.
Arixmethes is a creature and does not have summoning sickness.
({2} magic symbol) ({G} magic symbol) available.
Steps
Cast Sylan Awakening by paying ({2} magic symbol) ({G} magic symbol) , causing all lands you control to become 2/2 Elemental cratures with reach, indestructible and haste that are still lands until your next turn.