The new Ulamog exiles half an opponent's library when you cast them, and then uses the number of exiled cards to power itself up
Blue Inevitable Betrayal is a suspend take on Bribery
Its drawback may look like its very punishing and can allow the opponent to surprise you via a mid-combat spell, but I never really saw that scenario play out since its damage prevention ability is a a conditional static ability so as long as its on when damage is dealt, it wont be prevented. (Thank you, @fenaris!) It usually plays out somewhat like a colorless Ashenmoor Gouger / Chimeric Idol where you typically dont bother trying to block with it (why am I blocking with my aggro guys anyway?) and, if need be, you cast a spell pre-combat to activate it (typically I used a large coin, like a quarter, to denote whether it was on or off)
Whenever an opponent discards a land card, create a 1/1 black Bat creature token with flying
A zombie dwarf legend, which should tell you enough, Balthors two abilities are to strengthen minions, or bring back all red or black creatures in everyones graveyards to play