Saproling Migration

Kicker {4} (You may pay an additional {4} as you cast this spell.)
Create two 1/1 green Saproling creature tokens. If this spell was kicked, create four of those tokens instead.

Shanna, Sisay's Legacy

Shanna can't be the target of abilities your opponents control.
Shanna gets +1/+1 for each creature you control.

Yavimaya Sapherd

When this creature enters, create a 1/1 green Saproling creature token.

Tatyova, Benthic Druid

Landfall — Whenever a land you control enters, you gain 1 life and draw a card.

Sporecrown Thallid

Each other creature you control that's a Fungus or Saproling gets +1/+1.

Llanowar Elves

Hallar, the Firefletcher

Trample
Whenever you cast a spell, if that spell was kicked, put a +1/+1 counter on Hallar, then Hallar deals damage equal to the number of +1/+1 counters on it to each opponent.

Elfhame Druid

{T}: Add {G}.
{T}: Add {G}{G}. Spend this mana only to cast kicked spells.

Spore Swarm

Create three 1/1 green Saproling creature tokens.

Slimefoot, the Stowaway

Whenever a Saproling you control dies, Slimefoot deals 1 damage to each opponent and you gain 1 life.
{4}: Create a 1/1 green Saproling creature token.