Spend 10 to knock a building down: If you knock 20 buildings down, your work here is done; you win the game.
Your Egg Clutch has 50 Energy, and cannot Attack or defend, although you can choose to defend it. It produces a copy of you (with 50 Energy) at the end of every third round.
Twenty Storeys High
Double your Energy. However, during even-numbered Rounds, you must either repeat your Energy assignments from the previous round, or decrease them.
Everything Is a Projectile
Your creative use of the city as a weapon adds this Mutation's Mutation Strength to your Attacks but also earns you the wrath of a 20 Energy Militia which Attacks you for 5 each round until slaughtered.