msem-instigator

When Ancestral Council enters the battlefield, search your library for an instant or sorcery card with mana value 2 or less, reveal it, put it into your hand, then shuffle.

As Ancestral Facsimile enters the battlefield, choose reality or illusion.
Foresight — Whenever you draw your second card each turn,
• Reality — Tap target creature.
• Illusion — Scry 2.

({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}.”

Choose one —
• Target creature gains indestructible and lifelink until end of turn.
• Destroy target artifact or enchantment.

Look at the top seven cards of your library. Put two of them into your hand and the rest into your graveyard.

Scry 3. (To scry 3, look at the top three cards of your library, then put any number of them on the bottom of your library and the rest on top in any order.)

At the beginning of your upkeep, create an Idol token. (It's an artifact with “{1}, Sacrifice this artifact: Put a +1/+1 counter on target creature. Activate only as a sorcery.”)
{5}{W}{W}, Sacrifice three Idols: Return target creature card from your graveyard to the battlefield with three +1/+1 counters on it.

{T}: Add one mana of any color.
{4}, {T}, Sacrifice Ancestral Tapestry: Search your library for a legendary card, reveal it, put it into your hand, then shuffle.

Flash
When Ancestral Warlord enters the battlefield, it deals 1 damage to each blocking creature.

Equipped creature gets +1/+1.
Equip {1}

{3}, {T}: Ancient Artillery deals 1 damage to target creature or planeswalker and 1 damage to that permanent's controller.

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.

At the beginning of your upkeep, you gain 1 life.
{5}{W}{W}, Sacrifice Ancient Counsel: Create a 6/6 green and white Elk creature token. Activate only as a sorcery.

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

Whenever Ancient Durumderm attacks, you may return another creature you control to its owner's hand. If you do, create a Treasure token. (It's an artifact with “{T}, Sacrifice this artifact: Add one mana of any color.”)

Target creature you control gets +3/+3 until end of turn. Then if that creature has power 10 or greater, each other creature you control gets +3/+3 until end of turn.

Choose one—
• You gain life equal to the number of artifacts you control.
• You gain life equal to the number of enchantments you control.

Prevent all combat damage that Ancient Guardian would deal to or be dealt by creatures with no counters on them.

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.

Trample
When Ancient Pillan enters the battlefield, it fights up to one target creature an opponent controls.

Equipped creature has “Whenever this creature attacks or blocks, choose a creature card in your graveyard. This creature gets +X/+Y until end of turn, where X is that card's power and Y is its toughness.”
Equip {2}