Nice card, I like I like!
The unupped one should have cost lowered by 1.
It delays every turn so it dose 4 damage a turn unupped for 5 quanta, and 5 damage for 5 quanta when upped.
I think this card could use a small buff if you don't lower the cost, because there are tons of creature's with much more attack than cost, and it is not that bad.
Maybe change it to a 50-75% chance to delay for 1 turn. This would make a good attacker, but it can still backfire.
Honestly I would not use your current card just because that earth has better options right now, but if you had a chance for it to do a little more damage than it's cost it would be a great card.
That's just my thoughts.