As an additional cost to cast this spell, discard X cards.
Look at target opponent's hand and choose X cards from it. That player discards those cards.
{X}{1}{B}
Abandon Hope
Sorcery
As an additional cost to cast this spell, discard X cards.
Look at target opponent's hand and choose X cards from it. That player discards those cards.
{2}
Arcane Signet
Artifact
{T}: Add one mana of any color in your commander's color identity.
{3}
Basalt Monolith
Artifact
Basalt Monolith doesn't untap during your untap step.
{T}: Add {C}{C}{C}.
{3}: Untap Basalt Monolith.
{G}
Birds of Paradise
Creature - Bird
Flying
{T}: Add one mana of any color.
0 /
1
{2}{G}{U}
Bounty of the Luxa
Enchantment
At the beginning of your precombat main phase, remove all flood counters from Bounty of the Luxa. If no counters were removed this way, put a flood counter on Bounty of the Luxa and draw a card. Otherwise, add {C}{G}{U}.
--
Command Tower
Land
{T}: Add one mana of any color in your commander's color identity.
{U}{U}
Counterspell
Instant
Counter target spell.
{1}{U}
Cyclonic Rift
Instant
Return target nonland permanent you don't control to its owner's hand.
Overload {6}{U} (You may cast this spell for its overload cost. If you do, change "target" in its text to "each.")
{G}{W}{U}
Derevi, Empyrial Tactician
Legendary Creature - Bird Wizard
Flying
Whenever Derevi, Empyrial Tactician enters the battlefield or a creature you control deals combat damage to a player, you may tap or untap target permanent.
{1}{G}{W}{U}: Put Derevi onto the battlefield from the command zone.
2 /
3
{1}{G}{U}
Edric, Spymaster of Trest
Legendary Creature - Elf Rogue
Whenever a creature deals combat damage to one of your opponents, its controller may draw a card.
2 /
2
{W}
Enlightened Tutor
Instant
Search your library for an artifact or enchantment card, reveal it, then shuffle and put that card on top.
{1}{G}{W}
Faeburrow Elder
Creature - Treefolk Druid
Vigilance
Faeburrow Elder gets +1/+1 for each color among permanents you control.
{T}: For each color among permanents you control, add one mana of that color.
0 /
0
{G}{W}
Gaddock Teeg
Legendary Creature - Kithkin Advisor
Noncreature spells with mana value 4 or greater can't be cast.
Noncreature spells with {X} in their mana costs can't be cast.
2 /
2
{2}{W}
Idyllic Tutor
Sorcery
Search your library for an enchantment card, reveal it, put it into your hand, then shuffle.
{X}{G}{U}
Nissa, Steward of Elements
Legendary Planeswalker - Nissa
+2: Scry 2.
0: Look at the top card of your library. If it's a land card or a creature card with mana value less than or equal to the number of loyalty counters on Nissa, Steward of Elements, you may put that card onto the battlefield.
-6: Untap up to two target lands you control. They become 5/5 Elemental creatures with flying and haste until end of turn. They're still lands.
L:
X
{G}
Noble Hierarch
Creature - Human Druid
Exalted (Whenever a creature you control attacks alone, that creature gets +1/+1 until end of turn.)
{T}: Add {G}, {W}, or {U}.
0 /
1
{3}{G}
Oakhame Adversary
Creature - Elf Warrior
This spell costs {2} less to cast if an opponent controls a green permanent.
Deathtouch
Whenever Oakhame Adversary deals combat damage to a player, draw a card.
{T}: Creatures you control get +1/+1 until end of turn.
Create two 1/1 white Human creature tokens. (Then exile this card. You may cast the creature later from exile.)
2 /
2
{3}
Obelisk of Bant
Artifact
{T}: Add {G}, {W}, or {U}.
--
Opal Palace
Land
{T}: Add {C}.
{1}, {T}: Add one mana of any color in your commander's color identity. If you spend this mana to cast your commander, it enters the battlefield with a number of additional +1/+1 counters on it equal to the number of times it's been cast from the command zone this game.
{2}{U}
Rhystic Study
Enchantment
Whenever an opponent casts a spell, you may draw a card unless that player pays {1}.
{3}{U}
Rising Waters
Enchantment
Lands don't untap during their controllers' untap steps.
At the beginning of each player's upkeep, that player untaps a land they control.
{G}
Root Maze
Enchantment
Artifacts and lands enter the battlefield tapped.
{1}
Sol Ring
Artifact
{T}: Add {C}{C}.
{1}{U}
Stasis
Enchantment
Players skip their untap steps.
At the beginning of your upkeep, sacrifice Stasis unless you pay {U}.
{3}
Static Orb
Artifact
As long as Static Orb is untapped, players can't untap more than two permanents during their untap steps.
{W}
Swords to Plowshares
Instant
Exile target creature. Its controller gains life equal to its power.
{3}{U}{U}
Tamiyo, the Moon Sage
Legendary Planeswalker - Tamiyo
+1: Tap target permanent. It doesn't untap during its controller's next untap step.
-2: Draw a card for each tapped creature target player controls.
-8: You get an emblem with "You have no maximum hand size" and "Whenever a card is put into your graveyard from anywhere, you may return it to your hand."
L:
4
{4}
Thran Dynamo
Artifact
{T}: Add {C}{C}{C}.
{2}
Winter Orb
Artifact
As long as Winter Orb is untapped, players can't untap more than one land during their untap steps.