This fist is squared, because Muscle Wizard smart. Very smart.
Viewer: But you're not punching people, aren't you casting instances and sorc-
Mr.Muscle Wizard: Fist.
Viewer: But that's clearly a Comet Storm, this is a-
Mr.Muscle Wizard: Makes an intimidation roll. I SAID FIST²
Viewer, speaking through a now busted and bruised face: Ye-Yessir those comets- I mean meteor sized fists are very persuasive.
Listen I didn't really need a separate spoiler for these cards, there's not much to this section. But, this is the bread and butter. Gotta have a Fist² section.
Storm King's Thunder another game closer. If this resolves, it doesn't matter if the next spell you cast is a Big Score, you are going to make some waves. If I've ever cast this spell, shortly after I've won. But lets get into the win cons finally.
The WIn Cons are plain as day. Comet Storm, Chandra's Ignition and Crackle with Power . If these spells resolve, it is over. Once or twice Usually this will win you a game. But even if it doesn't win you the game, you're in a good position. Your opponents are likely low on health, they likely have a few less creatures, and you still have everything. So let's talk about how to maximize these spells.
Crackle with Power will quickly and easily wipe a table. Without any copy spells to abuse the spell even more, you do need 26 mana to deal 40 damage to everyone at the table. Or, 24 total mana cost reduction and 2 red mana.
Comet Storm is a worse offender at 44 mana.
That being said, without even using infinite combos which I will divulge shortly, you can easily get to these numbers if this is your desired path to victory. We already know about every other card in the deck we can use to bolster Vadrik and generate mana. Lets talk about the last few heavy hitters.
Increasing Vengeance and Storm King's Thunder, these two alone will very easily get there. And our mana cost reduction can heavily abuse these spells. Although, 4 red mana and 3 red mana respectively is a lot, so let's make sure we have some rituals in our hand, or an Apex of Power.
Finally we have the infinite combos. Reiterate will basically go infinite with any ritual card in the deck that can net more than 2 red mana. However it will require at most 4 power from Vadrik to do so. I'll explain to those who aren't familiar with the combo.
As mentioned earlier, mana cost reduction effects will also affect additional costs, and X cost spells. Therefore, if you have 4 power on Vadrik and a ritual spell, lets say your opponent has 3 cards in their hand and you're casting a Jeska's Will, you can cast Reiterate on that spell for buyback. Before the original Jeska's Will resolves, recast Reiterate targeting the same spell. Each time you do this, you net one mana. You do need to be weary, this is also an infite storm count for anyone that has the means to abuse it. And we're not that person.
Some cards that notably can be used with Reiterate for this combo:
Reality Spasm This one can also be used to tap down all of your opponents lands at their upkeep step, if you need to stop them from winning.
Big Score This doesn't get you infinite mana, but it does draw you your entire deck.
Frantic Search and Finale of Revelation Again, not really infinite but it's a lot of mana and draws you however many cards you feel like drawing.
Seething Song and Brass's Bounty this is infinite red mana, and infinite mana of any color respectively. Both of these rely on how many cards your opponents have, and how many lands you have respectively.
Jeska's Will Funny enough you can just keep exiling cards from the top of your libary even if there aren't any to exile. But if someone makes you draw while there are none to draw, you're done for. But you probably have your entire deck in exile, that you can cast so... Yeah good luck, have fun.
Comet Storm, Chandra's Ignition and Crackle with Power again, not infinite. But if you can copy these enough, even when they're cast low initial damage, you can kill everyone or clear the board. Or both.
Oh and for extra cheese, Past in Flames will also let you cast all cards from your graveyard for flashback for their CMC, which is.... Reduced by Vadrik's power...