Solemn Warning

Counter Trap Card

When a monster(s) would be Summoned, OR when a Spell/Trap Card, or monster effect, is activated that includes an effect that Special Summons a monster(s): Pay 2000 LP; negate the Summon or activation, and if you do, destroy it.

Rulings – Yugipedia

Printings:

Duelist Revolution: DREV-EN077 (Ultimate Rare) - 2010-08-17
Duelist Revolution: DREV-EN077 (Ultra Rare) - 2010-08-17
Collectible Tins 2011 Wave 2: CT08-EN015 (Super Rare) - 2011-11-01
Legendary Collection 3: Yugi's World Mega Pack: LCYW-EN301 (Common) - 2012-09-29
Duelist League 18 participation cards: DL18-EN019 (Rare) - 2014-06-27
Noble Knights of the Round Table Box Set: NKRT-EN035 (Platinum Rare) - 2014-11-20
Premium Gold: Return of the Bling: PGL2-EN068 (Gold Rare) - 2015-03-19
Synchron Extreme Structure Deck: SDSE-EN039 (Common) - 2015-08-27
Duelist Saga: DUSA-EN085 (Ultra Rare) - 2017-03-30
Structure Deck: Wave of Light: SR05-EN037 (Common) - 2018-01-18
Structure Deck: Spirit Charmers: SDCH-EN036 (Common) - 2020-10-22
25th Anniversary Rarity Collection II: RA02-EN078 (Collector's Rare)
25th Anniversary Rarity Collection II: RA02-EN078 (Platinum Secret Rare)
25th Anniversary Rarity Collection II: RA02-EN078 (Quarter Century Secret Rare)
25th Anniversary Rarity Collection II: RA02-EN078 (Secret Rare)
25th Anniversary Rarity Collection II: RA02-EN078 (Super Rare)
25th Anniversary Rarity Collection II: RA02-EN078 (Ultimate Rare)
25th Anniversary Rarity Collection II: RA02-EN078 (Ultra Rare)

Prices:

Cardmarket: 0.15 €
TCGplayer: $ 0.21