Thankfully, the Jafar card is there to return banished Illusions to your hand, which can keep in play some powerful cards like Iago Giant Spectral Parrot which also has Evasive and so is already pretty good at staying on the field
What the ciphered card offers is the spell cast trigger
5 Obeka, Splitter of Seconds Operates on a Whole New Axis Untap, Upkeep, Upkeep, Upkeep, Draw Obeka has distinguished herself as an Ogre of unique design sensibilities, with her previous iteration possessing the unique ability to end the current turn with her activated ability, circumventing potentially lethal "end step" triggers
Gaining more life in response to the triggered ability won't change how many counters will be distributed, nor will it change the distribution
Charge Across the Araba does indeed win you the game, but it was unplayable in constructed because it would require a dedicated white weenie deck, and that was not possible at any point that Kamigawa was legal