Team Effort

When one member enters the battlefield, search
your library for all other members and place them
on the battlefield tapped. They may not untap
until their mana cost is paid. If total members
is less than 4, create 1/1 MTF Soldier tokens
that are members of that MTF until there
are 4 total members. When 1 member
attacks, blocks, or uses an ability,
all members must attack, block, or use an ability.