If you want to get really fancy, Goblin Engineer lets you loop Arena in and out of your graveyard with its ability, letting you avoid its effects every turn
To help close out games, you can give cards with powerful effects storm to close out the game such as Lightning Bolt to deal a ton of burn damage or Ice Storm to destroy your opponents' lands
Learn more about the second print run of Magic's first set here.
Shes only one color, and that does limit your options considerably, but since her core strategy is oops, all legendaries, you can fit all sorts of different sub-strategies into the mix
(To mill four cards, a player puts the top four cards of their library into their graveyard.) Travel the Overworld Rarity: Uncommon TYPE: Sorcery SUBTYPE: - CMC: 7 Mana cost: USD: $0.19 EUR: 0.09 TIX: 0.03 EDHREC RANK: 9840 Affinity for Towns (This spell costs less to cast for each Town you control.) Draw four cards
It may not look like much, but creating a 1/1 every upkeep is a phenomenal rate