为 A-Llanowar Loamspeaker 寻找最佳的标准套牌，包括其胜率、热度，以及该牌在万智牌：竞技场中的合法赛制！
: Add one mana of any color.
: Target land you control becomes a 4/4 Elemental creature with haste until end of turn. It's still a land. Activate only as a sorcery.
