Bear Umbra

Enchant creature
Enchanted creature gets +2/+2 and has "Whenever this creature attacks, untap all lands you control."
Umbra armor (If enchanted creature would be destroyed, instead remove all damage from it and destroy this Aura.)

Runeclaw Bear

Grizzly Fate

Create two 2/2 green Bear creature tokens.
Threshold — Create four 2/2 green Bear creature tokens instead if seven or more cards are in your graveyard.
Flashback {5}{G}{G} (You may cast this card from your graveyard for its flashback cost. Then exile it.)

Words of Wilding

{1}: The next time you would draw a card this turn, create a 2/2 green Bear creature token instead.

Caller of the Claw

Flash
When Caller of the Claw enters, create a 2/2 green Bear creature token for each nontoken creature put into your graveyard from the battlefield this turn.

Caller of the Hunt

As an additional cost to cast this spell, choose a creature type.
Caller of the Hunt's power and toughness are each equal to the number of creatures of the chosen type on the battlefield.

Giant Growth

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

Ashcoat Bear

Flash (You may cast this spell any time you could cast an instant.)

Werebear

{T}: Add {G}.
Threshold — Werebear gets +3/+3 as long as seven or more cards are in your graveyard.

Balduvian Bears

Grizzly Bears

Alpha Status

Enchant creature
Enchanted creature gets +2/+2 for each other creature on the battlefield that shares a creature type with it.

Striped Bears

Overrun

Creatures you control get +3/+3 and gain trample until end of turn.

Muraganda Petroglyphs

Primal Bellow

Target creature gets +1/+1 until end of turn for each Forest you control.

Forest

Bear Cub

Bearscape

{1}{G}, Exile two cards from your graveyard: Create a 2/2 green Bear creature token.