msem-instigator

Target creature gets +3/+3 until end of turn and must be blocked this turn if able.
Showcase {3}{G}{G} (Then if you cast this for its showcase cost, create a 1/1 red Bard creature token that can't block and exile this. Whenever it attacks, you may cast a free copy of this.)

For each player, that player may search their library for a basic land card, choose a land card from their hand, and choose a land card from their graveyard, then put those cards onto the battlefield tapped. Then each player that searched their library this way shuffles it.

Other Warriors you control have trample.
{G}: Chratteri Valiant gets +2/+2 and gains trample until end of turn. Activate only once each turn.

During your opponents' turns, Chroma, the Faerie Circle has all basic land types in all zones.
Chroma, the Faerie Circle enters tapped.

Flying
Lands you control have “{T}: Add one mana of any color.”
As long as you control seven or more lands, creatures you control have trample, haste, and hexproof.

Lands you control have “{T}: Add one mana of any color.”
{T}: Add one mana of any color.

At the beginning of each player's draw step, that player draws an additional card.
Spells cost {1} less to cast.
Players may spend mana as though it were mana of any color.

Sacrifice Chromeleon: Add one mana of any color. Scry 1.

{2}, {T}, Sacrifice Chronomancer's Bauble: For each permanent with a time counter on it, you may put a time counter on that permanent or remove a time counter from it.

Whenever a player casts a spell, put a time counter on Chronovore Clock. Then if there are ten or more time counters on it, remove all time counters from it and end the turn.

Flying
Vanishing 3 (This creature enters with three time counters on it. At the beginning of your upkeep, remove a time counter from it. When the last is removed, sacrifice it.)
If Chronowing Phoenix would die while it had no time counters on it, instead exile it, then return it to the battlefield.

{2/R}{2/R}: Churning Rough-Roller gets +1/+1 and gains double strike until end of turn.

When Churning Spellroot enters, create three 1/1 black Worm creature tokens.

Mentor (Whenever this creature attacks, put a +1/+1 counter on target attacking creature with lesser power.)

Cinder Arrows deals 3 damage to target creature.

Equipped creature has haste.
Sacrifice Cinderblade: Equipped creature gains +2/+2 until end of turn.
Equip {1}

Trample
Whenever a player casts a spell, Cinderhoof Minotaur deals 1 damage to that player.
Whenever Cinderhoof Minotaur attacks, add {R}. Until end of turn, you don't lose this mana as steps and phases end.

Each player discards their hand and sacrifices five lands. Cinders of an Old Era deals 5 damage to each creature and planeswalker.
At the beginning of each player's next first main phase, that player draws seven cards and adds five mana in any combination of colors.

Circling Predators deals X damage to each creature, where X is 2 plus the number of cards with a cycling ability in your graveyard.
Cycling {2} ({2}, Discard this card: Draw a card.)

{1}{R}: Circus Firebreather gets +1/+0 until end of turn.

{X}, {T}: Reveal the top card of your library. If its mana value is X or less, you may play it without paying its mana cost. Otherwise, put it into your hand. X can't be 0.

{T}: Add {C}.
{1}{C}{C}, {T}: Return target legendary creature to its owner's hand.

{T}: Add {C}.
{3}, {T}, Sacrifice City Gate: Put two +1/+1 counters on target creature you control that attacked this turn.

Target creature attacks or blocks this turn if able.
Forebode. (Create a tapped colorless Omen artifact token with “{T}, Discard a card, Sacrifice this artifact: Draw a card.”)

Civilization's Cost deals damage to each player equal to the number of nonbasic lands that player controls.
Flashback {R} (You may cast this card from your graveyard for its flashback cost. Then exile it.)