Haste

Echo (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 Avalanche Riders enters the battlefield, destroy target land.

Elven Riders can't be blocked except by Walls and/or creatures with flying.

: Manta Riders gains flying until end of turn.

Vigilance

As Riders of Gavony enters the battlefield, choose a creature type.

Human creatures you control have protection from creatures of the chosen type.

This spell costs less to cast for each Human you control.

Trample, haste

At the beginning of your end step, if Riders of the Mark attacked this turn, return it to its owner's hand. If you do, create a number of 1/1 white Human Soldier creature tokens equal to its toughness.

Flying

When Stormfront Riders enters the battlefield, return two creatures you control to their owner's hand.

Whenever Stormfront Riders or another creature is returned to your hand from the battlefield, create a 1/1 white Soldier creature token.

At the beginning of each upkeep, create a 1/1 green Elf Warrior creature token.

Whenever another Elf enters the battlefield under your control, you gain life equal to its toughness.