msem-instigator

[+1]: Whenever a creature you control attacks this turn, Aleryn, Dungeon Disabler deals 1 damage to the defending player.
[–1]: Add X mana in any combination of {R} and/or {G}, where X is the number of creatures you control.
[–6]: You get an emblem with “Whenever a player casts a spell, this emblem deals 3 damage to any target.”

({T}: Add {G} or {W}.)
Alpine Meadow enters the battlefield tapped.

As Alratha, Pearl of the Sand Sea enters the battlefield, you may have an opponent investigate. If you don't, it enters the battlefield tapped.
{T}: Add {U}.
{1}{U}, {T}: Investigate.

Altar of Adversity enters the battlefield tapped.
{T}: Add {B}.
{T}: Add {R} or {W}. Altar of Adversity doesn't untap during your next untap step unless you control an Angel creature.

Altar of Chaos enters the battlefield tapped.
{T}: Add {R}.
{T}: Add {G} or {U}. Altar of Chaos doesn't untap during your next untap step unless you control an Angel creature.

Altar of Creation enters the battlefield tapped.
{T}: Add {U}.
{T}: Add {B} or {G}. Altar of Creation doesn't untap during your next untap step unless you control an Angel creature.

Altar of Destruction enters the battlefield tapped.
{T}: Add {G}.
{T}: Add {W} or {B}. Altar of Destruction doesn't untap during your next untap step unless you control an Angel creature.

Altar of Order enters the battlefield tapped.
{T}: Add {W}.
{T}: Add {U} or {R}. Altar of Order doesn't untap during your next untap step unless you control an Angel creature.

As Amber Hills enters the battlefield, you may pay 2 life. If you don't, Amber Hills enters the battlefield tapped.
{T}, Sacrifice Amber Hills: Search your library for a Forest or Plains card, put it onto the battlefield, then shuffle.

({T}: Add {G}.)
As Ancestral Glade enters the battlefield, you may pay 1 life. If you don't, Ancestral Glade enters the battlefield tapped.
Basic lands you control have “{T}: Add {G}.”

Ancient Cairns enters the battlefield tapped.
As Ancient Cairns enters the battlefield, choose a color other than red.
{T}: Add {R} or one mana of the chosen color.

({T}: Add {U}, {R}, or {W}.)
Ancient Dominion enters the battlefield tapped.

Puzzlebox (Begin the game with this and another card you own from outside the game in the command zone, locked. That card is face down until you unlock this.)
{6}: Unlock Ancient Maze. If the revealed card is green, put it into your hand. Otherwise, put it on top of your library.

{T}: Add {C}.
{3}, Discard Ancient Ossuary: Search your library for a land card, reveal it, put it into your hand, then shuffle.

Protection from instants and from sorceries
At the beginning of your upkeep, sacrifice another creature. For each creature sacrificed this way, put a +1/+1 counter on Andazir, the Crownless.
At the beginning of your end step, if you control four or fewer creatures, transform Andazir.

You may play Anemone Cluster from your graveyard as long as seven or more cards are in your graveyard.
Anemone Cluster enters the battlefield tapped.
{T}: Add {G} or {U}.
Cycling {1}{G}{U} ({1}{G}{U}, Discard this card: Draw a card.)

As Angelic Barracks enters the battlefield, you may pay 3 life. If you don't, it enters the battlefield tapped.
{T}: Add {U}, {R}, or {W}.

{T}: Add {C}.
{T}: Add {W}, {B}, or {G}. You can't spend this mana to cast a monocolored spell.

{T}: Add {C}.
{T}: Add {R}, {W}, or {B}. You can't spend this mana to cast a monocolored spell.

{T}: Add {C}.
{T}: Add {B}, {G}, or {U}. You can't spend this mana to cast a monocolored spell.

{T}: Add {C}.
{T}: Add {G}, {U}, or {R}. You can't spend this mana to cast a monocolored spell.

{T}: Add {C}.
{T}: Add {U}, {R}, or {W}. You can't spend this mana to cast a monocolored spell.

Activated abilities of sources you don't control can't be activated unless they're mana abilities.

Each land is an Island in addition to its other land types.

Whenever Apex of Augmentation attacks, other creatures you control can't be blocked this turn.