Kaarna, God of Wastelands

When Kaarna, God of Wastelands enters the battlefield, put X 1/1 elemental
land creatures with all colors onto the battlefield
under your control.
They have:"{t}: Add one mana of any colour
to your mana pool".
{w}{u}{b}{r}{g}: If a land creature you control
would tap for mana this turn,
it tap's for the double amount of mana instead.