Basalt Golem
{5}
Artifact Creature -- Golem
2/4
~this~ can't be blocked by artifact creatures.
Whenever ~this~ becomes blocked by a creature, that creature's controller sacrifices it at end of combat. If the player does, they create a 0/2 colorless Wall artifact creature token with defender.
Clockwork Steed
{4}
Artifact Creature -- Horse
0/3
~this~ enters with four +1/+0 counters on it.
~this~ can't be blocked by artifact creatures.
At end of combat, if ~this~ attacked or blocked this combat, remove a +1/+0 counter from it.
{X}, {T}: Put up to X +1/+0 counters on ~this~. This ability can't cause the total number of +1/+0 counters on ~this~ to be greater than four. Activate only during your upkeep.
Fen Hauler
{6}{B}
Creature -- Insect
5/5
Improvise (Your artifacts can help cast ~this~. Each artifact you tap after you're done activating mana abilities pays for {1}.)
~this~ can't be blocked by artifact creatures.