ruling questions

can someone tell how this word, for example I gave "researcher fox" the power from "tester fox" then gave it power from "artistic ocelot" and then restand it with "crayon tiger". how do i draw 3? even if i dont have something to retire with "crayon tiger" and "ocelot"

it says "draw a card, and retire that unit" can someone explain using the rulebook numbers so that i can have something to reflect on in future cards 😭