Serra's Sanctum [Urza's Saga] Fiend/Effect it's a great choice when

it's a great choice when your opponents are playing Link-heavy combo decks

you draw a card and that opponent discards a card from his or her hand

Attack 2: [M+] Altered Creation GX

Rarity: M #: 229 Card Type: Legendary Creature — Elder Giant P / T: 6 / 6 Description: When Uro enters the battlefield

this attack does 120 more damage

Serra's Sanctum [Urza's Saga] Fiend/Effect it's a great choice whenRarity: R Card Type: Legendary Land Description: T: Add W to your mana pool for each enchantment you control. TCGplayer Tip: Much like Gaea's Cradle and Tolarian Academy, which are also from Urza's Saga, Serra's Sanctum taps for an absurd amount of mana in any deck built around it. It doesn't take many enchantmemts to break this card in half.