Counter target spell unless its controller pays {4}. You may untap a land.

Whenever a permanent you control enters, you may put a living counter on it.
Permanents with living counters on them are 2/2 artifact creatures in addition to their other types.

Whenever you cast a green spell, choose up to X, where X is the number of green mana symbols in that spell's mana cost —
• Create a 1/1 white Human creature token.
• Put a +1/+1 counter on a creature you control.
• Put a trample counter, vigilance counter, or a reach counter on a creature you control.
• Untap target land.

Trample
Whenever another creature you control becomes the target of a spell you control, create a token that's a copy of that creature, except it has haste. Sacrifice that token at the beginning of the next end step.

As an additional cost to cast this spell, sacrifice a creature.
When Skophos Conqueror enters, draw a card. Skophos Conqueror deals 2 damage to each opponent.

Menace
Whenever your Champion attacks, you may discard a card. If you do, draw a card.

Reach
When this creature enters, create a green Subroutine enchantment token named MOUNT with “Whenever this Subroutine runs, target creature you control gets +2/+2 until end of turn.”

When Snowscryer enters, surveil 3.

When Sola enters, create a Treasure token.
{2}, Sacrifice a Treasure: You gain 3 life.
{2}, Sacrifice a Treasure: Draw a card.

Flying
When Soul's Sunset enters, exile up to two target cards from graveyards. You gain 2 life.
Surface {4}{B}{B}

Enchant creature with power 2 or less
You control enchanted creature.

{T}: Add one mana of any color.
At the beginning of combat on your turn, if you've spent at least five mana to cast spells this turn, untap Speaker of Endless Winter and put a +1/+1 counter on it.

As an additional cost to cast this spell, exile two permanent cards from your graveyard.
Whenever Spikey, Jack's Gravetiller deals combat damage to a player, return a card exiled with it to its owner's hand.
You may cast Spikey from your graveyard.

Whenever this creature deals combat damage to a player or planeswalker, put a +1/+1 counter on it.

As this artifact enters, choose two different colors.
Each spell you cast that's one or more of the chosen colors costs {1} less to cast.

Flying, haste
Whenever one or more +1/+1 counters are put on this creature, it deals that much damage to each opponent.
At the beginning of your end step, return this card from your graveyard to your hand if one or more +1/+1 counters were put on a creature you control this turn.

Level up {2}{B}
[level 1-2] Other creatures get -1/-1.
[level 3+] Creatures your opponents control get -1/-1.

{T}: Surveil 1.
{1}, {T}: Tap target creature.
{2}, {T}: Draw a card.
Flow — {3}: Untap this artifact.

Whenever you cast an instant, sorcery, or Aura spell that targets only Star-Seeking Dreamer, copy that spell for each other creature you control that the spell could target. Each copy targets a different one of those creatures.

First strike
Landfall — Whenever a land you control enters, you may tap target creature.

Steamveil Model enters with a +1/+1 counter on it.

When Stehlian Reverend enters, put a +1/+1 counter on target creature.
Cybersoul {4}{W}

Flying

Equipped creature gets +1/+3 and has vigilance.
Equip {5}. This ability costs {2} less to activate if you have at least 3 life more than your starting life total.

Flying
When Stratus Fledgling enters, it acclimates.
Weather spells you cast cost {1} less to cast.