Not only does it affect combat right away with trample and a +1/+1 counter, but it filters cards and triggers off any discard, which means you have some built-in protection against Thoughtseize style effects, plus synergy with your own rummanging and looting
However, what works best would be an A6 size that measures 4 by 6 inches in order to incorporate a handful of details or an A8 size that measures 5 by 8 inches
Dovins Veto Ah yes, the anti-Counterspell counterspell
An artifact that specifically hoses mirror matches through mutually assured destruction
This pretty much guarantees drawing 2 cards or more for only two mana, which is an extremely efficient and rare rate in MTG
However, Specter of Mortality isn't a creature tacked onto a boardwipe -- it's the other way around