Oldtrees, in PvP, decks usually pack some kind of CC or PC unless rushing. This card attempts to deal with that by giving you the choice to make it a permanent or creature, with the only cost being 1
and a 1 turn delay (and as I said with Morphing Clay, this card does not burrow when compared to Graboid). Also, consider this compared to the Other weapons:
Hammer/Short Bow : 4 damage max for 2
quanta.
Flying Sword: 4 Damage max for 2
quanta, with added option of being a creature for 1
and 1 turn delay.
Gavel/Long Bow : 7 damage max for 2
quanta.
Flying Blade: 6 damage max for 2
quanta, with added option of being a creature for 1
and 1 turn delay.
Based on this, the card feels balanced.