Shieldmage Elder is a uncommon Creature — Human Cleric Wizard card from Onslaught (ONS), collector number 54. Current market price: $0.23 (foil $1.00), TCGplayer market prices via Scryfall.
Tap two untapped Clerics you control: Prevent all damage target creature would deal this turn. Tap two untapped Wizards you control: Prevent all damage target spell would deal this turn.