Thicket of Solitude3G
Whenever a player taps a land for mana during his or her turn, that player adds to his or her mana pool one mana of any type that land produced.
If a player would tap a land for mana during another player’s turn, that land produces colorless mana instead of any other type.
Creature - Goblin Soldier
Whenever ~ attacks and isn’t blocked, you may destroy a nonbasic land defending player controls at random. If you do, ~ assigns no combat damage this combat.