Shrink

Target creature gets -5/-0 until end of turn.

Shield of the Oversoul

Enchant creature
As long as enchanted creature is green, it gets +1/+1 and has indestructible. (Damage and effects that say "destroy" don't destroy it. If its toughness is 0 or less, it's still put into its owner's graveyard.)
As long as enchanted creature is white, it gets +1/+1 and has flying.

Crash the Ramparts

Target creature gets +3/+3 and gains trample until end of turn.

Llanowar Elves

Forest

Death-Hood Cobra

{1}{G}: Death-Hood Cobra gains reach until end of turn.
{1}{G}: Death-Hood Cobra gains deathtouch until end of turn.

Barkshell Blessing

Target creature gets +2/+2 until end of turn.
Conspire (As you cast this spell, you may tap two untapped creatures you control that share a color with it. When you do, copy it and you may choose a new target for the copy.)

Alluring Scent

All creatures able to block target creature this turn do so.

Three Visits

Search your library for a Forest card, put it onto the battlefield, then shuffle.

Echoing Courage

Target creature and all other creatures with the same name as that creature get +2/+2 until end of turn.

Byway Courier

When Byway Courier dies, investigate. (Create a Clue token. It's an artifact with "{2}, Sacrifice this artifact: Draw a card.")

Nurturer Initiate

Whenever a player casts a green spell, you may pay {1}. If you do, target creature gets +1/+1 until end of turn.

Revive

Return target green card from your graveyard to your hand.

Arachnus Web

Enchant creature
Enchanted creature can't attack or block, and its activated abilities can't be activated.
At the beginning of the end step, if enchanted creature's power is 4 or greater, destroy Arachnus Web.