As long as you control a Jace planeswalker, Jace's Sentinel gets +1/+0 and can't be blocked.

• Number: 283
• Rarity: U
• Power: 1
• Toughness: 3
• Type: Creature
• Subtype: Merfolk Warrior
• Mana cost: 1U
• Color: Blue
• Artist: Alex Konstad