Outlands Prowler has first strike as long as it's your turn.
Landfall — Whenever a land you control enters, Outlands Prowler gets +2/+2 until end of turn.

When Padpole enters, create a Berry token.
Surface {3}{G}

When Parental Pair enters, create a token that's a copy of it, except it's 2/2 and doesn't have this ability.
Amity — Whenever you attack with Parental Pair and exactly one other creature, you may have Parental Pair fight target creature.

You draw two cards, lose 2 life, and mill two cards.

When Pathetic Cocoon enters or dies, create a Berry token.

Return up to one target artifact, enchantment, or land card from your graveyard to your hand.
Create two Berry tokens.

Landfall — Whenever a land you control enters, Pitfall Pincher deals 1 damage to any target. If that target is a creature, it blocks this turn if able.

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 gets +0/+2 and gains hexproof until end of turn.

Return a land you control to its owner's hand: Plated Tunneler gets +1/+0 and gains menace until end of turn.

Landfall — Whenever a land you control enters, Plucky Trainer gets +2/+2 until end of turn.

Once each turn, when you activate a creature, you may create a tapped token that's a copy of it, except it's a 1/1 Toy in addition to its other types and it isn't legendary.

Poised Flame deals 2 damage to any target.
Add {R}{R}. You can't spend this mana to cast spells.

When Poisoned Rose enters, create a Berry token.
{B}, Sacrifice a Berry: Target creature gets -1/-1 until end of turn. You can't activate this ability during combat.

When Pollen Warning enters, create a 1/1 green Plant creature token, then put a +1/+1 counter on a creature you control.

When Practicing Guru enters, create a Berry token.
Practicing Guru gets +1/+1 as long as you've sacrificed a Berry that was attached to it this turn.
Sacrifice a Berry attached to Practicing Guru: It gains indestructible until end of turn.

Flying, haste
Landfall — Whenever a land you control enters, put a +1/+1 counter on Pressuring Ghoul unless any opponent discards a card.

{T}: Add {C}.
{3}, {T}, Sacrifice Prickly Dunes: Create two 1/1 green Plant creature tokens. Activate only as a sorcery.

Primal Fissure enters tapped unless you control two or fewer other lands.
{T}, Sacrifice Primal Fissure: Search your library for a basic land card, put it onto the battlefield, then shuffle.

When Primordial Seas enters and whenever you cast a spell, create a token that's a copy of another target permanent you control.

{T}: Create a 1/1 blue Fish creature token with haste. Exile it at the beginning of the next end step. Activate only as a sorcery.

Amity — This spell costs {R} less to cast if you attacked with exactly two creatures this turn.
When you cast your next instant or sorcery spell this turn, copy it. You may choose new targets for the copy.

{U}: Psychohopper gains flying until end of turn.
{2}{G}: Psychohopper gets +2/+2 until end of turn. Activate only once each turn.

Trample
Amity — Whenever you attack with Puddle Crasher and exactly one other creature, look at the top three cards of your library. Put one of them into your hand and the rest into your graveyard.

Whenever you attack, create a tapped and attacking token that's a copy of target attacking creature, except it isn't legendary. Sacrifice it at the beginning of the next end step.