Roar of Challenge

All creatures able to block target creature this turn do so.
Ferocious — That creature gains indestructible until end of turn if you control a creature with power 4 or greater.

Blanchwood Armor

Enchant creature
Enchanted creature gets +1/+1 for each Forest you control.

Silvos, Rogue Elemental

Trample
{G}: Regenerate Silvos, Rogue Elemental.

Ranger's Path

Search your library for up to two Forest cards, put them onto the battlefield tapped, then shuffle.

Canopy Cover

Enchant creature
Enchanted creature can't be blocked except by creatures with flying or reach.
Enchanted creature can't be the target of spells or abilities your opponents control.

Primal Bellow

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

Alpha Authority

Enchant creature
Enchanted creature has hexproof and can't be blocked by more than one creature.