If you control a tuner monster and a non-tuner monster, you can send them both to the graveyard to synchro summon a synchro monster that has a level equal to the combined levels of the two monsters used to summon it
Shirei, Shizos Caretaker A fun budget commander, Shirei, Shizo's Caretaker is a nice payoff for sac decks focused on small creatures
Tap three tokens to draw a card Tap four tokens to put three +1/+1 counters on Baylen and give him trample for the turn
Because of these changes though, sadly, they can also be somewhat unbalanced (further than the base game), and multiple people have been reporting bugs that can either cause major issues, or even break save files completely
Karlov of the Ghost Council can do it all as both an easily buffed beater or a removal-heavy control piece, hiding behind a pillow fort of life
, Sacrifice six Blood tokens: Return each creature card from your graveyard to the battlefield with a finality counter on it