Rotation is Coming: Best Wildcard Investments

Rotation is just around the corner and even though spoilers for Zendikar Rising are weeks away at the earliest, it's good to begin thinking about the best investments for wildcards if Standard is your format of choice on MtG Arena. Typically, aggro to midrange decks are highly played shortly after rotation, but there are a few control cards worth thinking about using for wildcards as well. Remember that wildcards are not the easiest to acquire on Arena, so it's best to evaluate your playstyle, and think about what colors you plan on playing post-rotation.
As stated in the August 2020 State of the Game, Wizards plans on releasing a format where people can begin practicing for post-rotation called Standard 2021 Ranked (Best-Of-One only), so this is a great place to begin evaluating what cards are going to help you determine how you'd like to play competitively, and how to invest your resources.

Embercleave
It should be no surprise that Embercleave is one of the best investments post-rotation as the card is a staple in any aggro-to-midrange deck that uses mountains. Since shock lands are rotating, it's important to note that the format will be slowed. Aggressive decks are usually the first place people tend to turn after rotation, and since Anax, Hardened in the Forge
Brazen Borrower
Speaking of Temur Clover, one of the biggest staples of its deck, as well as Bant Midrange, Sultai Midrange, and Azorius Control is Brazen Borrower. The past few days on social media, people have been getting tired of seeing this clever little adventure card bouncing a card as well as providing a 3/1 flyer. As proven by the now-banned Teferi, Time Raveler
Shatter the Sky
By far one of the best board wipes with very little drawback, if you plan on playing control at all, this will be an important use of a rare wildcard because you'll need a way to fend off those aggressive decks. Shatter the Sky

Elspeth Conquers Death
If a deck runs white outside of very aggressive decks, they will be running Elspeth Conquers Death
Uro, Titan of Nature's Wrath
Admittedly, this card should have been placed before Embercleave
Shark Typhoon
Admittedly, the idea for this article started as a whole bunch of aggressive cards that will rule the format, but there is a ton of blue that will also see a ton of play post-rotation. Shark Typhoon

Stonecoil Serpent
colorlessScavenging Ooze
The Ooze wreaked havoc many years ago in Standard, and it now returns with a vengeance. Ooze is the worst enemy of anyone who wants to use the graveyard for anything, including the common Uro, Titan of Nature's Wrath
Questing Beast and Elder Gargaroth
These two absolutely have to be put into the same category because they are both bulky green monsters with a wall of text. Questing Beast

Ugin, The Spirit Dragon
With the War of the Spark planeswalkers rotating out, don't forget about the one that will be arguably the most powerful in the format: Ugin, the Spirit Dragon
Teferi, Master of Time
Just because Teferi, Time Raveler
Murderous Rider
Most, if not all, decks running black will be using this awesome adventure card that not only destroys a planeswalker or creature, but also provides a 2/3 body with Lifelink. Other than paying the small price of 2 life for the Swift End part of the card, there are no drawbacks as it provides a fantastic amount of value.
While there are other cards beyond those listed that could make a big difference, these are the rares and mythics (not including Triome/Temple lands) that will provide the best returns on investment going into Zendikar Rising. One of the best ways to prepare other than examining the current Standard post-bans is to look at the last two Zendikar blocks. Battle for Zendikar rewarded people for making the most out of their lands with the awaken mechanic by paying an additional cost to a spell to create a permanent animated land. While in Battle for Zendikar, the original Zendikar set had some innovative uses for Landfall, such as creating tokens, pumping creatures, exiling cards, and manipulating life totals.
Join the Standard 2021 Event coming to MtG Arena soon and begin doing research on which cards to spend your wildcards to be best prepaRed for rotation and Zendikar Rising Standard.