Pause for Reflection is a common Instant card from Guilds of Ravnica (GRN), collector number 140. Current market price: $0.15 (foil $0.26), TCGplayer market prices via Scryfall.
Convoke (Your creatures can help cast this spell. Each creature you tap while casting this spell pays for {1} or one mana of that creature's color.) Prevent all combat damage that would be dealt this turn.