yugioh armor ninja deck Back in the days in the HAT format, Bujin was a top to beat and part of the metagame. In the last 10 years, this archetype only got 4 new cards PHHY-EN036 - Yaguramaru the Armor

Im not sure how much a Grixis deck cares about that, but lets include the corner cases since there arent many frogs to chat about

You can see an overview here: 90% (4th card), 60% (5th card) 5% (4th card), 20% (5th card) 1.666% (4th card), 6.664% (5th card) 2.572% (4th card), 10.288% (5th card) 0.5% (4th card), 2% (5th card) 0.222% (4th card), 0.888% (5th card) 0.04% (4th card), 0.16% (5th card) So, if you open 1,000 boosters, there should be one to two cards of the crown rarity

Angel of Serenity: My problem playing Angel of Serenity is always if I want to put one or more of my own creatures under it, so that I can rebuild after a Wrath of God

Out of the new cards, Time Bends to My Will is definitely the most interesting, but it does require some setup

A 2/2 for three mana, Captain Rex Nebula has the incredibly unique trait of being able to convert any nonland permanent you control into a Vehicle with crew 2 and power and toughness equal to its mana value at the beginning of combat on your turn