If all the monsters in your Graveyard are EARTH: You can Tribute this card to target 2 Level 4 or lower Rock-Type monsters in your Graveyard, except "Block Golem"; Special Summon those targets, but their effects that activate on the field cannot be activated this turn.
Block Golem would fit really well into a Magnet Warrior deck because almost all it's monsters are level 4 EARTH Rock-types. Additionally magnet warriors are mostly normal monsters so Block Golem will leave no drawbacks.
Beta the Electromagnet warrior can activate his effect during your opponent's turn, dodging Block Golems drawback, and is an effective way of milling Magnet Warriors from your deck.
Quick question. Block Golem stops the monsters effects that activate on the field, so if you summon Delta from the GY using its effect, then you could crash and summon Valkyrion using its effect.
A
so its semi good for tributes, its just getting earth monsters in the graveyard part thats tedious, maybe needlenest can help