macro cosmos yugioh deck [SGX3-ENF19] Common – TokenMTG Macro Cosmos | Yu-Gi-Oh! Wiki

The knight does 500 damage to your opponent each time they activate a card or effect

If you activated this card while your opponent controlled no cards, for the rest of this turn you cannot activate cards, or the effects of cards, with the same original name as that banished card

This means that they cant respond to you foretelling a card, though casting the card from exile does use the stack

Or, in other words, youre adding four mana to the cost of one of your spells to fix your mana for that spell

If a player does, counter Temporal Extortion

[2] During your opponent's End Phase, if this card is in the GY: You can add it to your hand