When you do, this creature becomes a copy of another target creature you control, except it has this ability and "Whenever this creature deals combat damage to a player, you get that many ." Creature - Shapeshifter Blaster Hulk This spell costs less to cast for each (energy counter) you've paid or lost this turn
We only know of the siege subtype
It's also great in a fetchland format as it gives you a versatile mana dork that can swap to one that affects life totals
Drafna is a great commander to double up on all your important artifacts
Wizards of the Coast has released dozens of Commander precons across multiple sets, including yearly product lines like Commander 2020 , Commander 2021 , and special sets like Modern Horizons 3
Then if you don't Twist on those key turns it is often just dead weight for the rest of the game hitting a land at best