Multi Token is a Machine Token.
Read the full card text for activation timing, costs, and once-per-turn limits before you slot it in a deck.
On the current TCG and OCG Forbidden & Limited lists tracked here, Multi Token is Unlimited.
YGOPRODeck lists Multi Token for these formats: Duel Links.
Among markets shown on this page, the lowest listed snapshot for Multi Token is about $1.75 on eBay (prices change frequently).
