Haste
{T}, Discard a card: Put a +1/+1 counter on another target creature you control and untap it. It gains haste until end of turn. Activate only as a sorcery.

Calmed Battleground enters tapped unless you control a Plains.
{T}: Add {B} or {R}.

Amity — Whenever you attack with Calming Celestial and exactly one other creature, Calming Celestial acclimates.
As long as you control a blue Weather, Calming Celestial has flying.

Trample
When Canopy Creeper enters, create two Berry tokens.

When Capricious Cat enters, it acclimates twice.

Once each turn, when Carefree Kappa enters or becomes the target of a spell or ability, you may create a Weather enchantment token that's all colors named Looks Like Rain with “Whenever you attack, you gain 1 life.”
Carefree Kappa gets +1/+1 for each Weather you control.

Draw a card if you discarded a card this turn.
You gain 3 life if you've lost life this turn.
Create a 1/1 white Golem creature token if a creature you controlled left the battlefield this turn.

This spell costs {X} less to cast, where X is the amount of mana you've spent to activate abilities this turn.
Exile target nonland permanent.

Charge Beam deals 4 damage to target creature or planeswalker.
Amity — If you attacked with exactly two creatures this turn, Charge Beam deals 2 damage to that permanent's controller.

Amity — Whenever you attack with Charged Party and exactly one other creature, create a token that's a copy of Charged Party that's tapped and attacking, except its power and toughness are switched. Sacrifice the token at the beginning of the next end step.

{W}: Charismatic Chameleon gains lifelink until end of turn.
{1}{R}: Charismatic Chameleon gets +1/+1 until end of turn.
{2}{U}: Charismatic Chameleon can't be blocked this turn.

Amity — When you cast this spell, copy it if you attacked with exactly two creatures this turn. You may choose new targets for the copy.
Target creature you control gets +2/+2 until end of turn. Untap it.

Lifelink
{1}{W}: Put a stun counter on target creature that attacked this turn. Activate only once each turn.

Whenever you cast a spell from your graveyard, each opponent loses 1 life and you gain 1 life.
Surface {3}{B}{B}. Chum Chaser surfaces transformed.

Flying, lifelink
{2}{W}: Untap each creature you've activated this turn. They get +1/+1 and gain lifelink until end of turn. Activate only once each turn.

{1}, Sacrifice Claw Fossil: Target creature has base toughness 1 until end of turn. Activate only as a sorcery.
Surface {2}{B}. Claw Fossil surfaces transformed.

Whenever you attack, put a +1/+1 counter on a creature you control.

Choose one —
• Exile target enchantment.
• You gain 4 life.
• Acclimate.

Enchant creature
When Collector's Item enters, surveil 2.
Enchanted creature loses all abilities and is a colorless Sculpture creature with base power and toughness 0/2.

Counter target activated ability from a nonland source.
Draw a card.

When Contest Coordinator enters, look at the top five cards of your library. You may reveal a Plains card or a nonland card with an activated ability from among them and put it into your hand. Put the rest on the bottom of your library in a random order.

Once each turn, when you activate an ability of a creature you control, untap that creature and put a +1/+1 counter on it.

Once each turn, when you activate a nonmana ability, you gain 2 life.

{T}, Tap another untapped creature you control: You may tap or untap another target creature.
Whenever Contest Star becomes untapped, draw a card.

{T}: Add one mana of any color.
{T}: Draw a card, then discard a card. Activate only if you've cast a non-Human creature spell this turn.