Involuntary Cooldown
The Brothers' War — Uncommon
Sorcery
Sets Involuntary Cooldown has been printed in:

The Brothers' War — Uncommon
Sorcery
Sets Involuntary Cooldown has been printed in:

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Legendary Planeswalker — Tezzeret
+1: Untap up to two target artifacts.
-X: Search your library for an artifact card with mana value X or less, put it onto the battlefield, then shuffle.
-5: Artifacts you control become artifact creatures with base power and toughness 5/5 until end of turn.
Instant
This spell can't be countered. (This includes by the ward ability.)
Tap up to two target creatures and put a stun counter on each of them. Investigate. (If a permanent with a stun counter would become untapped, remove one from it instead.)
Enchantment — Saga
(As this Saga enters and after your draw step, add a lore counter. Sacrifice after III.)
I — Gain control of up to one target artifact for as long as you control Scroll of Isildur. The Ring tempts you.
II — Tap up to two target creatures. Put a stun counter on each of them.
III — Draw a card for each tapped creature target opponent controls.
Enchantment — Saga
(As this Saga enters and after your draw step, add a lore counter. Sacrifice after IV.)
I — Put two stun counters on each of up to two target tapped creatures.
II, III — For each non-Saga permanent, choose a counter on it. You may put an additional counter of that kind on that permanent.
IV — Search your library for a Doctor card, reveal it, put it into your hand, then shuffle.
Creature — Eldrazi Sphinx (5/5)
Emerge (You may cast this spell by sacrificing a creature and paying the emerge cost reduced by that creature's mana value.)
When you cast this spell, tap up to two target permanents. Put a stun counter on each of them. (If a permanent with a stun counter would become untapped, remove one from it instead.)
Flying
Instant
Convoke (Your creatures can help cast this spell. Each creature you tap while casting this spell pays for or one mana of that creature's color.)
Tap up to two target creatures. Put a stun counter on either of them. Then put a stun counter on either of them. (If a permanent with a stun counter would become untapped, remove one from it instead.)
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