As long as Gaea's Liege isn't attacking, its power and toughness are each equal to the number of Forests you control. As long as Gaea's Liege is attacking, its power and toughness are each equal to the number of Forests defending player controls. {T}: Target land becomes a Forest until Gaea's Liege leaves the battlefield.
Giant Turtle can't attack if it attacked during your last turn.
"The turtle lives 'twixt plated decks/ Which practically conceal its sex./ I think it clever of the turtle/ In such a fix to be so fertile." —Ogden Nash, "The Turtle"
{T}: Flip a coin. If you win the flip, draw a card. If you lose the flip, counter target artifact spell you control that isn't the target of an ability from another creature named Goblin Artisans.
{2}, {T}, Pay {R} for each target: Tap any number of random target creatures. Goblins tapped in this way do not untap during their controllers' next untap phases.
Trample Goblin Rock Sled doesn't untap during your untap step if it attacked during your last turn. Goblin Rock Sled can't attack unless defending player controls a Mountain.
Flying {R}: Granite Gargoyle gets +0/+1 until end of turn.
"While most overworlders fortunately don't realize this, Gargoyles can be most delicious, providing you have the appropriate tools to carve them." —The Underworld Cookbook, by Asmoranomardicadaistinaculdacar