With Wrenn and Realmbreaker out, your lands all tap for any color of mana, giving you all the colors of mana you need to cast your spells
Port Town itself is neither a Plains nor an Island, even though it produces white and blue mana, so you can't reveal one to satisfy the ability of another
When you exile a nonland card this way, Hidetsugu, Devouring Chaos deals damage equal to the exiled cards mana value to any target
Gitaxian Probe + Mishra's Bauble Let's put it this way: A cantrip that you can pay for with life rather than mana, and tells you what your foe's up to, is so fundamentally broken that Gitaxian Probe is banned in Modern and Legacy, and it's also restricted in Vintage, where it's no stranger to top-tier decks
For the black Avatar, it was if there were 10 creatures in all graveyards
Now, while this is a card that's hardly going to blow anyone away on its own, you might be itching to find a place for it in your deck alongside the next two cards