Boxing Ring: Green has never been great at removing creatures, but a two-drop artifact that allows your creatures to fight enemy creatures and then create a treasure if they fought this turn is a decent way to help clear the way for your big stompy bodies to get through for combat damage
If youre still the monarch during your upkeep, youll get the big payoff: doubling the number of +1/+1 counters on each creature you control
And then the strategy and complexity actually comes on which cards you choose, how you employ your cards
The first sentence is simple
Artist Proofs for Magic the Gathering are highly limited printings of the cards from Wizards of the Coast that are distributed exclusively to the artists who created the artwork for each card
They also push you towards casting one big spell a turn, be it board wipes like Farewell and Sunfall or top-end planeswalkers such as Elspeth, Sun's Champion and Ugin, the Spirit Dragon, which lets you play around Eidolon of Rhetoric and friends quite well