Merida, Legion Caesar

Soldiers you control have Haste, Lifelink, and
First Strike.
Whenever another player taps two or more lands
for mana, that play gets a poison counter.
(A player with ten or more poison counters loses
the game.)
At the beginning of each player's upkeep, that player may remove a poison counter. You gain five life for each poison counter
removed this
way.