Divide by Zero will return the spell (or permanent) to your hand, Reject can counter creatures/planeswalkers, and Test of Talents can take out all four copies of an instant or sorcery
Additionally, Rasaad has the added benefit of making cards like Charix, the Raging Isle, potentially game-ending threats while also buffing blink targets that happen to have high toughness, like Aarakocra Sneak
This is also a fun combo with Basking Rootwalla, giving you essentially a free creature from your deck if it's lurking in there
Zegana, Utopian Speaker As the only legendary creature with Adapt, Zegana stands out in both gameplay and flavor
In addition to serving as flexible removal and a massive body in combat, this creature immediately puts your opponents on a timer, as whenever Ulamog attacks, you exile the top twenty cards of the defending player's library
Players can't lose life this turn and players can't lose the game or win the game this turn