Plains

Phalanx Leader

Heroic — Whenever you cast a spell that targets this creature, put a +1/+1 counter on each creature you control.

Forest

Common Bond

Put a +1/+1 counter on target creature.
Put a +1/+1 counter on target creature.

Guardian's Magemark

Flash
Enchant creature
Creatures you control that are enchanted get +1/+1.

Giant Growth

Target creature gets +3/+3 until end of turn.

Beastmaster's Magemark

Enchant creature
Creatures you control that are enchanted get +1/+1.
Whenever a creature you control that's enchanted becomes blocked, it gets +1/+1 until end of turn for each creature blocking it.

Treetop Bracers

Enchant creature (Target a creature as you cast this. This card enters attached to that creature.)
Enchanted creature gets +1/+1 and can't be blocked except by creatures with flying.

Season of Growth

Whenever a creature you control enters, scry 1. (Look at the top card of your library. You may put that card on the bottom.)
Whenever you cast a spell that targets a creature you control, draw a card.

Hero of Leina Tower

Heroic — Whenever you cast a spell that targets this creature, you may pay {X}. If you do, put X +1/+1 counters on this creature.

Razor Barrier

Target permanent you control gains protection from artifacts or from the color of your choice until end of turn.

Fabled Hero

Double strike
Heroic — Whenever you cast a spell that targets this creature, put a +1/+1 counter on it.

Armadillo Cloak

Enchant creature
Enchanted creature gets +2/+2 and has trample.
Whenever enchanted creature deals damage, you gain that much life.

Hero of Iroas

Aura spells you cast cost {1} less to cast.
Heroic — Whenever you cast a spell that targets this creature, put a +1/+1 counter on this creature.