If you tried it out for a year and it didnt stick, or youre just not enjoying Magic, selling what you have to invest into a different hobby is always fine
Overall) - Fumulus, the Infestation This four-cost legendary Commanderable Vampire Insect with flying and deathtouch is next
Slobad, Goblin Tinkerer: A good way to protect a valuable artifact with the sacrifice of a less valuable artifact
Against an Articuno with a hat or a cape, Rotom can deal 70 damage a turn for just one energy
You can even play some enchantments that double your mana to gain faster access to this combo, like Mirari's Wake
Tapping down an Urzas Tower in your opponents upkeep can effectively Time Walk them, and it can give a number of decks that little bit of time they need to take over