diff --git a/oracle.go b/oracle.go
index d6be645..077503f 100644
--- a/oracle.go
+++ b/oracle.go
@@ -73,8 +73,17 @@ func OracleEnters(c *Card, g *Game) {
 		g.QueuedEffect = &Effect{c.Id, uuid.Nil, 2, 1}
 		g.TargetReq = TargetOwn
 	case Enemy:
-		g.QueuedEffect = &Effect{c.Id, uuid.Nil, 4, 1}
+		g.QueuedEffect = &Effect{c.Id, uuid.Nil, 2, -1}
 		g.TargetReq = TargetOpp
+	case Chupacabra:
+		g.QueuedEffect = &Effect{c.Id, uuid.Nil, 4, 0}
+		g.TargetReq = TargetOpp
+	case Duelist:
+		g.QueuedEffect = &Effect{c.Id, uuid.Nil, 6, 1}
+		g.TargetReq = TargetOwn
+	case Vanguard:
+		g.QueuedEffect = &Effect{c.Id, uuid.Nil, 7, 1}
+		g.TargetReq = TargetOwn
 	}
 }
 
@@ -204,9 +213,33 @@ func OracleEffect(c *Card, g *Game) {
 		case 3:
 			c.BasePower = e.Modifier
 		case 4:
-			c.Power = c.Power - e.Modifier
+			g.Bury(c)
+		case 5: //+x/+0
+			if g.CurrentTurn == c.Owner {
+				c.Power = c.Power + e.Modifier
+			}
+		case 6: //+0/+x
+			if g.CurrentTurn != c.Owner {
+				c.Power = c.Power + e.Modifier
+			}
+		case 7: //+x/-x
+			if g.CurrentTurn == c.Owner {
+				c.Power = c.Power + e.Modifier
+			} else {
+				c.Power = c.Power - e.Modifier
+			}
+		case 8: //-x/+x
+			if g.CurrentTurn == c.Owner {
+				c.Power = c.Power + e.Modifier
+			} else {
+				c.Power = c.Power + e.Modifier
+			}
+
 		default:
 			log.Println("wrong effect type")
 		}
 	}
+	if c.Power < 0 {
+		c.Power = 0
+	}
 }