Seseila, Undercity Queen

+1: Create a 5/5 Mech artifact creature token.
-2: Merge target Rogue with target inactive Mech. You draw X cards where X is the amount of times this creature has merged.
-6: Create an colorless Seseila Emblem with "At the beginning of your upkeep, you may sacrifice a permanent. if you do, create a Power Core token.