Sphinx of the Final Word can't be countered.
Flying, hexproof
Instant and sorcery spells you control can't be countered by spells or abilities.

• Number: 63
• Rarity: M
• Power: 5
• Toughness: 5
• Type: Creature
• Subtype: Sphinx
• Mana cost: 5UU
• Color: Blue
• Artist: Lius Lasahido