Grim Lavamancer punished creature-based decks
I explained exactly how this devilish duo worked when The Master Multiplied shot up in value last week, so to keep it short and sweet, I'll just say that targeting The Master when you first cast Deadpool, Trading Card lets you make a bunch of Deadpool tokens on subsequent turns and borrow all of your opponents' best creatures
This generates enough card advantage to be worth the risk
Summary Cards from Pioneer Masters are best suited for Historic formats, not Standard, with strong options for Brawl and Explorer
Similarly, if you sacrifice a creature to activate a mana ability while casting a spell with convoke, that creature wont be on the battlefield when you pay the spells costs, so you wont be able to tap it for convoke
Orvar will allow you to use instants and sorcery spells to target your permanents and make token copies of them