union arena tcg booster box BANDAI Arknights UA30BT Pack JAPAN OFFICIAL Experience the white Union Arena TCG English UE09BT

Here's a quick look: This version of Heartbeat of Spring introduces the relationship between Saheeli and Huatli, which you can read more about here

Where Should You Play Them Going forward, I think using the Companion slot is for when you already have a list that wont be disrupted heavily by the restriction

You see, you only lose the life if you actually draw the card and don't replace it

It contains 146 cards, including a never before seen foil card of the Mythical Pokmon, Hoopa-EX

Now repeat for infinite mana, ETBs, LTBs, Magecraft triggers, and Landfall

It is only because blue has so many potent cards that do much the same sorts of thing as Mystic Confluence that keeps this lower in the top five