Creature â Naga Cleric
You may look at the top card of your library any time.
You may cast creature spells from the top of your library.
You may spend mana as though it were mana of any type to cast creature spells.
Victor Adame Minguez
Youâ€™ll still pay all costs for that spell, including additional costs. You may also pay alternative costs such as emerge or that of As Foretold.
You may spend mana as though it were mana of any type to cast any creature spell, not just creature spells that you cast from the top of your library.
Vizier of the Menagerie lets you look at the top card of your library whenever you want (with one restrictionâ€”see below), even if you donâ€™t have priority. This action doesnâ€™t use the stack. Knowing what that card is becomes part of the information you have access to, just like you can look at the cards in your hand.
The top card of your library isnâ€™t in your hand, so you canâ€™t cycle it, discard it, or activate any of its activated abilities.
Normally, Vizier of the Menagerie allows you to cast the top card of your library if itâ€™s a creature card, itâ€™s your main phase, and the stack is empty. If that creature card has flash, youâ€™ll be able to cast it any time you could cast an instant, even on an opponentâ€™s turn.
If the top card of your library changes while youâ€™re casting a spell, playing a land, or activating an ability, you canâ€™t look at the new top card until you finish doing so. This means that if you cast the top card of your library, you canâ€™t look at the next one until youâ€™re done paying for that spell.