RiderDecade, Generation's Link

Lifelink
{1}: Search your library for a Soldier permanent card and put it into your graveyard. If you do, RiderDecade, Generation's Link becomes a
copy of that card until end of turn. Then shuffle your library.
Partner. If you control another Elemental Soldier creature you gain "{x}{x}{w}{g}: Put X Soldiers from your graveyard into play. They
gain haste. Exile them at the beginning of
the next end step."