Cumulative upkeep {1} (At the beginning of your upkeep, put an age counter on this permanent, then sacrifice it unless you pay its upkeep cost for each age counter on it.)

When Ancestral Knowledge enters the battlefield, look at the top ten cards of your library, then exile any number of them and put the rest back on top of your library in any order.

When Ancestral Knowledge leaves the battlefield, shuffle your library.

Trample

When Armada Wurm enters the battlefield, create a 5/5 green Wurm creature token with trample.

Protection from black and from red

Whenever another creature enters the battlefield, you may gain 1 life.

{1}{G}, Exile two cards from your graveyard: Create a 2/2 green Bear creature token.

If target creature has toughness 5 or greater, it gets +4/-4 until end of turn. Otherwise, it gets +4/-X until end of turn, where X is its toughness minus 1.

When Breya, Etherium Shaper enters the battlefield, create two 1/1 blue Thopter artifact creature tokens with flying.

{2}, Sacrifice two artifacts: Choose one --

• Breya deals 3 damage to target player or planeswalker.

• Target creature gets -4/-4 until end of turn.

• You gain 5 life.

{T}: Prevent the next 1 damage that would be dealt to any target this turn.

{R}: Disciple of the Old Ways gains first strike until end of turn.

Nonbasic landwalk (This creature can't be blocked as long as defending player controls a nonbasic land.)

Enchant creature

When Earthbind enters the battlefield, if enchanted creature has flying, Earthbind deals 2 damage to that creature and Earthbind gains "Enchanted creature loses flying."

Destroy target creature unless its controller pays life equal to its toughness. A creature destroyed this way can't be regenerated.

Choose one --

• Target player gains 3 life.

• Prevent the next 3 damage that would be dealt to any target this turn.

You and target opponent each flip a coin. Mana Clash deals 1 damage to each player whose coin comes up tails. Repeat this process until both players' coins come up heads on the same flip.

{T}: Add {C}.

{1}, {T}: Add one mana of any color.

{R}, {T}: Target creature gets +2/+0 until end of turn.

{W}, {T}: Tap target creature.

Each player may search their library for up to X basic land cards and put them onto the battlefield tapped. Then each player who searched their library this way shuffles.

Target opponent reveals their hand. You may copy an instant or sorcery card in it. If you do, you may cast the copy without paying its mana cost.

You gain 4 life.

Target creature you control gains protection from the color of your choice until end of turn.

Draw a card.

Enchant creature

At the beginning of the upkeep of enchanted creature's controller, that player loses 1 life.

As an additional cost to cast this spell, you may pay {1}{G} any number of times.

You gain 3 life plus an additional 3 life for each additional {1}{G} you paid.

At the beginning of your upkeep, draw a card if you control the creature with the greatest power or tied for the greatest power.

Return target permanent card from your graveyard to your hand. Proliferate. (Choose any number of permanents and/or players, then give each another counter of each kind already there.)

You gain X plus 3 life.