The only way to become a Tindarian is by being a nice & active member of the Tindie community!
If another (or the same) Space Beleren returns to the battlefield, creatures on the battlefield at that time will once again be assigned to sectors, but their new sector assignments are not influenced by any previous sector assignments they may have had
Secondly, these decks have played Abbot of Keral Keep as the scaling two-drop of choice, and Scourge seems much better in that role
Alternatively, in a pinch, you can also target an opponent, putting a land on top of their deck to stall their draw step, removing a dead creature in response to an Animate DeadAnimate Dead, or burying the important card they just retrieved with a Vampiric TutorVampiric Tutor or Lim-Dul's VaultLim-Dul's Vault or the top-deck they set up for Aminatou, the FateshifterAminatou, the Fateshifter
This effect creates some fantastic synergies with most of the other rats Ive mentioned