You can produce a 4-color identity for your deck with pairings like these examples: Red, white, black, and green with Akiri, Line-Slinger + Reyhan, Last of the Abzan White, blue, black, and green + = Ishai, Ojutai Dragonspeaker + Ikra Shidiqi, the Usurper #16
For these cards, you get each of these alternate versions as often as the other and, in total, as often as other Booster Fun cards that only have a single variant
Target creature gets +1/+1 and gains first strike until end of turn
Protect the value of cards for trading, collections
Even more in the modern days of the internet, where shady offers are just a click away
The best part is that people often won't tap and use stuff if they think Nahiri is just going to exile it, and often creatures won't get used