AFFIRMED. Because of Appellant’s repeated unsuccessful challenges to denials of postconviction relief and petitions for extraordinary relief, Appellant is cautioned that the filing of additional meritless appeals could subject him to sanctions. See State v. Spencer, 751 So.2d 47 (Fla. 1999); Ardis v. Pensacola State College, 128 So.3d 260 (Fla. 1st DCA 2013); § 944.279, Fla. Stat.