{1}{G}, Sacrifice this creature: Search your library for a basic land card, put that card onto the battlefield tapped, then shuffle. If this card is in a graveyard, effects from spells named Muscle Burst count it as a card named Muscle Burst.
Plainswalk Whenever this creature deals combat damage to a player, you may have target land become a Plains until this creature leaves the battlefield.
At the beginning of your upkeep, you may create a 1/1 green Squirrel creature token. Threshold — All Squirrels get +2/+2 as long as there are seven or more cards in your graveyard.
{T}: Add {R}. This land deals 1 damage to you. Threshold — {R}, {T}, Sacrifice this land: It deals 2 damage to any target. Activate only if there are seven or more cards in your graveyard.
{T}: Add {B}. This land deals 1 damage to you. Threshold — {B}, {T}, Sacrifice this land: Target creature gets -2/-2 until end of turn. Activate only if there are seven or more cards in your graveyard.