Infernal Grasp Both Heartless Act and Power Word Kill were played in black controlish decks, and I think Infernal Grasp is an upgrade for both
Proliferating it will also let you use it as protection for something like Atraxa, Praetors Voice Preston, the Vanisher FromTheShire: Let the Felidar Guardian shenanigans commence
Unlike Fusion monsters, which require a Polymerization spell or another card with the same effect, Synchros can be summoned from the renamed Extra Deck (previously the Fusion Deck), at the cost of a Tuner monster along with other regular monsters on the field
For example, Peer into the AbyssPeer into the Abyss becomes a lethal fireball for an opponent
In addition to these well-known Commander cards, the set also has several hidden gems that may have been overlooked because of the sets bad reputation
This was both the first WATER archetype and the first Aqua archetype