Ioreth of the Healing House and Minamo do not have summoning sickness.
Arixmethes is a creature and does not have summoning sickness.
({4} magic symbol) ({G} magic symbol) available.
Steps
Cast Rude Awakening by paying ({4} magic symbol) ({G} magic symbol) , causing all lands you control to become 2/2 creatures that are still lands until end of turn.