If an Ally entering at the same time as Katara (including Katara herself) causes a triggered ability of an Ally you control to trigger, that ability triggers an additional time
While a number of the cards from this set have aged poorly (looking at you, Skyshroud Behemoth), a number were notable threats at that time but dont quite make the cut on this modern value-based list: Lin Sivvi, Defiant Hero was the engine for Rebel decks from this era, Saproling Burst slotted perfectly into Fires of Yavimaya decks (and also formed an instant-win combo with Pandemonium), and Rising Waters fueled a brutal control deck alongside the various Stax pieces and counterspells from sets of this era
For the Final Fantasy set, it feels like the pace of the game has become much faster, with characters like Lightning having some ridiculous combos attached to her
But hey, you can't have Avacyn Restored without this 8/8 indestructible angel that makes all your other creatures indestructible
You can obtain the Mega Charizard Y ex (4-Diamonds rarity) card by opening Crimson Blaze from Crimson Blaze set