Caustic Bronco (ES) MKM Whenever Thief of Sanity deals

Whenever Thief of Sanity deals combat damage to a player

As Murmuring Bosk enters the battlefield

Exile Soul of Innistrad from your graveyard: Return up to three target creature cards from your graveyard to your hand

When Bishop of the Bloodstained enters the battlefield

{1}: Permanents your opponents control lose hexproof and indestructible until end of turn

Caustic Bronco (ES) MKM Whenever Thief of Sanity dealsWhenever Caustic Bronco attacks, reveal the top card of your library and put it into your hand. You lose life equal to that card's mana value if Caustic Bronco isn't saddled. Otherwise, each opponent loses that much life. Saddle 3 (Tap any number of other creatures you control with total power 3 or more: This Mount becomes saddled until end of turn. Saddle only as a sorcery.)