Cool card. Possibly OP though.
Fractal sparks comes to mind. Your hand is 1 Eden, 1 fractal, 5 sparks. You suddenly have 11 sparks and play eden. You now have 88 worth of damage on the field that will surivive until the enemy plays a suitable creature, even without denial, he may simply not be able as his are on the field already and he draws a tower/perm/spell.
Of course spark isn't the only combo, pests would probably be a better example, as this would stop the enemy from drawing creatures while dealing huge amounts of damage. Frogs would be a very powerful one to do also.