If you don't know, you can tell what set a card is from by looking at the symbol at the bottom right side of the card art (not the bottom right near the yellow border, the symbol to the right of the Pokemon's height and weight)
They can either allow you to take on a weaker opponent, or stall until youre ready to face stronger cards Mismagius ex or Cresseilia ex.
This allows you to play out your turn without having to worry about someone trying to interact with you with removal or counterspells
Let's head back to uncommon for the next card
On Consul's Lieutenant, this ability makes your other attackers stronger and tougher
Daybound (If a player casts no spells during their own turn, it becomes night next turn.) ---- Lifelink Nightbound (If a player casts at least two spells during their own turn, it becomes day next turn.) Card info Curse of Leeches editions Decks with Curse of Leeches