If a creature is about to die to something unrelated to Vampiric Dragon, then go ahead and spend two mana to put your mark on the creature, and then when it dies, you'll get a +1/+1 counter
The problem is that these cards only see play in this one deck, so if the Eldrazi do not catch on, there probably won't be all that much demand for Grim Monolith and Metalworker outside of cube
Overseas printing companiesmost of them operating in mainland Chinanow print sets in bulk and sell them through sites like Alibaba
Even better, it easily it transforms into Cecil, Redeemed Paladina 4/4 lifelinker that gives your other attacking creatures indestructible whenever it swings
It sounds like it might be fun to try and do some weird instant-speed multi-target spells on your own creatures to get as much value as you can from this in one turn cycle
Once a player has the initiative, there will only be one initiative designation for the rest of the game