Alara's Leige

Trample; When Alara's Leige is attacking or
blocking; you can increase its power and
toughness to each equal to the number of basic
of one type that the defender or attacker controls
, respectively.
{t} Target land becomes a basic land of your
choice until Alara's Liege leaves the battlefield.
"The mages of Esper experimented infusing a wood
elemental of the forest with Etherium. The verdant
juggernaut that emerged had the terrifying power
to disorder their land at will."