You control a creature that can deal 5 combat damage to players each turn.
Steps
At the beginning of combat on your turn, Ria Ivor triggers, targeting a creature you control.
Declare that creature as an attacker.
Instead of that creature dealing damage to an opponent, instead prevent that damage and create at least five 1/1 Phyrexian Mite artifact creature tokens.
Activate Time Sieve by tapping it and sacrificing five Phyrexian Mite tokens.