People seriously want the damage dealt to be the health of the creature?
That will allow a gravity/air duo to have a 3-turn win that can not be stopped by shields or CC.
Imagine the following hand:
5 Gravity Towers, 2 Titans, 1 Trebuchet.
Turn 1: Play the 5 Gravity Towers. You have 5
. Play the Catapult. You have 2
.
Turn 2: You have 8
and draw an Animate Weapon. Play a Titan, Animate it, and launch it. You deal 50 damage. You have 1
.
Turn 3: You have 7
and draw an Animate Weapon. Play a second Titan, Animate it, and launch it. You deal 50 damage and win.
3-turn wins should be extremely difficult and stopped by Shields/CC. They should also be limited to fast elements such as Fire.
If you don't want upgraded play to be even more completely ruined, please don't buff Catapult and Trebuchet.