See Pollen Gust. Test sky vs. water plane mechanic for the sky side.

I suggest linking not just some random cards for the set, but also at least one comment explaining what aerial and aquatic do/mean.

Aerial and aquatic are supertypes to designate which of the two factions the spell belongs too. I was inspired by Snow, but I did not want to include basic aquatic or aerial lands, as ic recall Wizards regretting having done so with snow basics (admittedly, that was some years ago, so my memory may be wrong). I am trying to make snow without falling on the lands.