Forbidding Watchtower

This land enters tapped.
{T}: Add {W}.
{1}{W}: This land becomes a 1/5 white Soldier creature until end of turn. It's still a land.

Ardent Recruit

Metalcraft — This creature gets +2/+2 as long as you control three or more artifacts.

{T}, Sacrifice this land: Search your library for a basic land card, put it onto the battlefield tapped, then shuffle.

{T}, Sacrifice this creature: Target creature gets -4/-4 until end of turn.
Sacrifice a creature: Target creature gets -1/-1 until end of turn.

Sacrifice this creature: Put a -1/-1 counter on target creature.

Metalcraft — {T}: Tap target artifact, creature, or land. Activate only if you control three or more artifacts.

When this creature dies, create a 1/1 colorless Phyrexian Myr artifact creature token.

Infect (This creature deals damage to creatures in the form of -1/-1 counters and to players in the form of poison counters.)
{T}: Add {C}.

When this creature dies, you may search your library for a basic land card, put it onto the battlefield tapped, then shuffle.