mtg exile cards from the top of your library until Jodah, Unifier (PDMU) #203p Volcanic Torrent [Commander Legends]

If your Commander costs four mana, then this will likely be a fair mana spent to give a +4/+4 boost and this fits

It might seem non-threatening, but this creature ramped up its power and toughness by copying it from other Eldrazi played

Chaos: Whenever you roll Chaos, you may discard any number of cards in your hand

Theres also something fun about making your opponent make the call on the flip that could decide the game

(And if you're still learning, even better, as MTG Arena is excellent for new players!) They have Sealed events starting June 25, and the play experience is still the same, great Magic

Valakut Awakening / Valakut Stoneforge Valakut Awakening is another combo piece, or at least something that can help you get there