If you're building a Ninja Kindred deck, it's very likely Silent-Blade Oni is your best option
Talrand, Sky Summoner is a control deck, and he could literally be the only win condition in your entire deck if you so choose, which means you can run a TON of disruption
Oko, Thief of Crowns The most broken of many broken things in the power crept Throne of Eldraine , Oko, Thief of Crowns elking everything was just too much to chew on when it adds loyalty to do that, instead of minusing the way removal abilities usually worked with planeswalkers
Rank: Want to Build General Leo CristopheGeneral Leo Cristophe This could be a good Blink commander, but five mana seems steep for this effect
Sign in Blood and Nights Whisper are about as good, as they cost just two mana
Instead of talking about the Rembrandt of card alterations, let's take a look at some good ones I found on Tumblr