Solitude, The broken

+2: Deal X amount of damage to target creature or player, where X is the amount of mana you control. Take half of that total damage.
-3: But a 3/3 Broken machine creature token onto the battle field with haste. Exile it at the beginning of your next upkeep.
-7: Both players take an extra turn, then swap battlefields. This includes creatures, and enchantments.