Thundermare
{5}{R}
Creature -- Elemental Horse
5/5
Haste (~this~ can attack and {T} as soon as it comes under your control.)
When ~this~ enters, tap all other creatures.
Timbermare
{3}{G}
Creature -- Elemental Horse
5/5
Haste
Echo {5}{G} (At the beginning of your upkeep, if this came under your control since the beginning of your last upkeep, sacrifice it unless you pay its echo cost.)
When ~this~ enters, tap all other creatures.