Ovinomancer [Time Spiral Timeshifted] Core Set 2020 during your opponent's Main Phase

during your opponent's Main Phase or your opponent's Battle Phase

if this card is being attacked by an opponent's monster

and it gains the following effect while face-up on the field

Each player can only use the effect of "Twin- Headed Behemoth" once per Duel

Ovinomancer [Time Spiral Timeshifted] Core Set 2020 during your opponent's Main PhaseSet: Time Spiral Timeshifted Type: Creature Human Wizard Rarity: Rare Cost: {2}{U} When Ovinomancer enters the battlefield, sacrifice it unless you return three basic lands you control to their owner's hand. {T}, Return Ovinomancer to its owner's hand: Destroy target creature. It can't be regenerated. That creature's controller creates a 0 1 green Sheep creature token.