I think there should be a 3rd option for a different element. Also, what use does this have in Gravity besides Massive Dragon in mono and duoing with ? Is there a combo I'm missing out on here or is the idea just to promote more combos?
Why does the combo have to be with ? You don't have to play every creature in the element. Besides, several elements have 3 flying creatures, so it could duo with them. Why can't play a duo with and not play any Massive Dragons?
Well, technically there are already cards in game that really only synergize with cards from different elements (like Schrodinger's Cat and the cards that need a buff like Dune and Deathstalker). So it could be fine as a Gravity card that works best with Air cards. The fact that it actually synergize with Massive Dragon makes it more in element synergetic compared to the three cards I mentioned earlier.
Theoretically, if you played 1 unupped Zeppelin, and 1 upped Zeppelin, all airborne creatures would gain the buff every round, correct?
NOTES: Odd|Even rounds are counted from the time Zeppelin is played, so upped grants the buff on the turn it is played.Effect is not stackable, multiple Zeppelins in play will not grant extra buff.If original Zeppelin is killed but there is another one in play then the round count will continue as if nothing happened. If there is a difference between the Zeppelins (original upped, second unupped or vice versa) then the count will continue according to the active Zeppelin (Odd->Even or vice versa).Zeppelin is airborne.
