Ramses is a good creature and a lord for an assassin typal deck, but its just not a good win the game card
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So forget about combos from your opponents
Exchange that card with the top card of your library., so you basically just end up losing the game and probably a Swamp, but if you are able to cast a Darkpact you get to essentially trade your opponent a Swamp for whatever they anted - pretty dirty and cheesy, especially if they flip over a spicy rare
The sacrifice portion could trigger things like Cruel Celebrant in B/W and be used to discard reanimation targets into the graveyard to bring back with Goryo's Vengeance
Im no ornithologist, but I do know eagles are a type of raptor, which leads me to think this feathered friend might be aligned with Halvar, the white-flavoured god of battle