Invocation is an in-archetype fusion card, letting you summon a whole range of deadly fusion monsters, depending on what monsters you have in your hand
That would be Dinoruffia Diplos
Then, if you have 11 or more cards in your hand, you can cast an instant or sorcery without paying its mana cost
For instance, Force of Despair is a good way to deal with Emrakul, the World Anew, which has protection from all spells, and it can deal with other combo decks, like Living End, that play multiple creatures in one decisive turn
It is indeed why I didn't even really consider "tempo" to be an archetype earlier in my magic history as I didn't really appreciate what fundamental elements defined it
The official Japanese suggested retail price is 6,200 yen including tax