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.

Landfall — Whenever a land you control enters, exile the top card of your library. You may play that card until the end of your next turn.
{1}{R}, Sacrifice Crumbling Tower: It deals damage equal to the number of cards exiled with it to target player.

Destroy target creature. Create two Berry tokens.

Cryptic Reef enters tapped.
{T}: Add {G} or {U}.
{2}{G}{U}, {T}, Sacrifice Cryptic Reef: Draw a card.

Return target permanent card with an activated ability from your graveyard to the battlefield. You may activate its abilities this turn as though it had haste.

Ward {3}
Daunting Snapper can't be blocked by creatures with power 2 or less.

Ward {2}
Amity — Whenever you attack with Dazzling Performer and exactly one other creature, put a +1/+1 counter on each of those creatures. Until end of turn, they gain trample and “Whenever this creature deals combat damage to a player, draw a card.”

Deeplife Cavern enters tapped unless you control a Forest.
{T}: Add {U} or {B}.

Flying
{1}, {T}: Draw a card, then discard a card.
Whenever one or more creatures you control deal combat damage to a player, untap Delivery Gull.

Depths Ancient's power and toughness are each equal to the number of cards in your graveyard plus the number of exiled cards you own with surface.
Surface {5}{B}{B}

When Desolate Lands enters and whenever you cast a spell, it deals 3 damage to target opponent unless they sacrifice a permanent.

Whenever Devourer of Fortunes enters or attacks, return up to one target instant or sorcery card in a graveyard or creature on the battlefield to its owner's hand. You may cast a copy of it, and may spend mana of any type to cast it.

When Diamond Dust enters and whenever you cast a spell, put a +1/+1 counter on each creature you control.

Vigilance
Landfall — Whenever a land you control enters, you may discard a card. If you do, draw a card.
{R}{W}: You may play land cards from your graveyard this turn.

Target creature gets +2/+0 and gains first strike until end of turn. If it's a Dragon, put a +1/+1 counter on it.

Flying
Amity — Whenever you attack with Dustwing Butterfly and exactly one other creature, create a tapped and attacking token that's a copy of target creature you control, except it's 1/1 and isn't legendary. Sacrifice that token at the beginning of the next end step.

Flying
Amity — Whenever you attack with Dustwing Moth and exactly one other creature, Dustwing Moth deals 2 damage to any target.

Landfall — Whenever a land you control enters, surveil 2.

Flying
Amity — Whenever you attack with Earthbreaker Dragon and exactly one other creature, Earthbreaker Dragon deals 1 damage to each of up to two target creatures without flying.

Vigilance
Once each turn, when you activate a nonmana ability, you may copy it. You may choose new targets for the copy.
{1}{U}{R}{W}, {T}: Tap target creature. Echocrafter deals 1 damage to that creature's controller.