Released in the very first set of the game, Dark Ritual is a staple in every format it's legal in, from the casual Commander format to the highest-powered formats of Legacy and Vintage
X the following turn
That up-front Adventure is just a bonus -- the real reward is outlasting the opponent with reanimation that draws from either graveyard, which is even better in "aristocrats" builds.
The Behemoth has haste to swing on the turn it arrives, and the Cavalry has flying permanently, so it's always evasive
To hope to win (because nothing is impossible), you must try to quickly outnumber your opponent, with combos like Ohm/Holy, for example, or with some of your trigger effects, or quickly manage cards that can eliminate your characters
I think Aggron VMAX is stunning and is, along with Kingler VMAX and Mimikyu VMAX from VMAX Climax , a great way to close out the VMAX era