Effect Veiler [25YC-EN002] Ultra Rare ARC018-R and it also introduced era

and it also introduced era defining cards like Jinzo and Imperial Order to the game as well

(Quick Effect): You can pay half your LP

you can return 1 face-up "Mist Valley" card you control

The result is multiplied by 100 points and added to the ATK and DEF of all monsters you control until the end of your turn

Effect Veiler [25YC-EN002] Ultra Rare ARC018-R and it also introduced eraSet: Yu Gi Oh! Championship Series Prize Cards Card type: Tuner Effect Monster Rarity: Ultra Rare Attack: 0 Defense: 0 During your opponent's Main Phase (Quick Effect): You can send this card from your hand to the GY, then target 1 Effect Monster your opponent controls; negate the effects of that face up monster your opponent controls, until the end of this turn.