Kaito Shizuki has a really interesting phasing ability to keep him around a turn cycle, slotting nicely into Yuriko builds
Its instant-speed and can tag Planeswalkers, just like Lava Axe used to be able to
Ill also keep an eye out for ways to copy that backup ability
You can also delve into dungeons such as the Dungeon of The Mad Mage, Tomb of Annihilation and Lost Mine of Phandelver locations that would be quite familiar to D&D players, that are incorporated into MtG as an actual part of the games mechanic rather than just a card to be used like any other
Sure, if your opponent happens to only have one land that can produce one of their colors and you stick this on it, it can be pretty hilarious, but most of the time thats not going to happen to them
Similarly, the cost reduction from its second ability applies only to generic mana in the unlock costs of Rooms you control