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Summoning or Tributing a monster, changing the battle position of a monster, or paying the maintenance cost of a card are not considered card effects, and they do not start chains by themselves
About a third of the time, we get the rest of the options (with one and four turns being five times as likely as zero or five)
You then get to retrace all your nonland permanent cards on your turn, discarding that land you got back to cast a spell from your graveyard by paying its mana cost
(When a creature with afterlife 1 dies, create a 1/1 white and black Spirit creature token with flying.) Because blockers are chosen all at once, you can't block with a creature with afterlife, wait for it to die, then block with the resulting Spirit tokens