Creature â Archon
Flying, vigilance, trample
As Archon of Valor's Reach enters the battlefield, choose artifact, enchantment, instant, sorcery, or planeswalker.
Players can't cast spells of the chosen type.
Whether itâ€™s legal to cast a spell is determined before its costs are paid. This means that if Archon of Valorâ€™s Reach has sorcery as the chosen type, you canâ€™t cast Morbid Curiosity, even if you wish to sacrifice Archon of Valorâ€™s Reach to do so.
The enters-the-battlefield effect of Archon of Valorâ€™s Reach is a replacement effect that doesnâ€™t use the stack. No player can cast spells or activate abilities after it has entered the battlefield but before you choose a card type.