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Just using cards i have gotten from boosters i wanted to use knight of the reliquary and jace the mind sculptor in the same deck this is what i came up with its heavy in draw cards and heavy in mana as the knights get +1/+1 for each land in the graveyard
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im not going to suggest much because i do not know what cards you have however i can tell you one thing having 30 lands in this deck is a terrible idea, especially when you only have two copys of knight of the reliquary. another thing i dont understand is the reliquary tower, you dont have enough card draw for it to really support you.
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Again, your deckbuilding would benefit from the "only 4-ofs" rule that I suggest for new players. Of the cards you use, choose only the very best ones for the deck, and run four of them. (You could run less than four of the legendary cards and of rare cards you don't have enough of, but for ordinary commons and the like, you should try to stick to four-ofs or none-ofs.) In this case, I recommend: 4x Knight of the Reliquary 4x Merfolk Looter 4x Bant Sureblade 4x Winged Coatl 4x Evolving Wilds 4x Terramorphic Expanse 4x Realms Uncharted (this thins your deck out and supports Knight) + other stuff I suggest dropping: Excommunicate (it's not very useful, even just compared to Oust) Obelisk of Bant (you don't need a ton of mana for this deck)