Underdark Beholder | Mystery Booster(ミステリーブースター)収録カード

Underdark Beholder | Mystery Booster(ミステリーブースター)収録カード

MTG「Mystery Booster」の収録カード

Underdark Beholder(R&D Playtest cards)



Underdark Beholder
Creature — Beholder(見る者、観察者、知覚者)
CARDNAME enters the battlefield with ten eyestalk counters on it.
If CARDNAME would be dealt damage, remove that many eyestalk counters from it instead. If you can’t, sacrifice it.
Whenever CARDNAME attacks, reveal cards from the top of your library until you reveal an instant, sorcery, or enchantment card with converted mana cost less than the number of eyestalk counters on CARDNAME. You may cast it without paying its mana cost. Shuffle your library.


  • Underdark Beholder’s second ability isn’t a damage-prevention effect. It can replace damage that can’t be prevented.
  • If Underdark Beholder leaves the battlefield while its last ability is on the stack, use the number of eyestalk counters it had before it left to determine what converted mana cost to look for.
  • You must cast the revealed card while Underdark Beholder’s triggered ability is resolving. You can’t cast it later in the turn.
  • If a spell has {X} in its mana cost, you must choose 0 as the value of X when casting it without paying its mana cost.
  • If you cast a card “without paying its mana cost,” you can’t choose to cast it for any alternative costs. You can, however, pay additional costs. If the card has any mandatory additional costs, such as that of Tormenting Voice, you must pay those to cast the card.


MTG「ミステリーブースター」の「R&D Playtest cards」は、マジックフェスト等の大会で使用される「Convention Edition」のパックに限定収録されるカードです。

また、「R&D Playtest cards」はパック15枚中に1枚封入という封入率仕様となっています。

 MTG「ミステリーブースター TEST CARD」カードリストまとめ


エキスパンション・シンボル:エルドレインの森 MTG