It Depends How You Look at It Ambiguity's text was designed to make fun of the fact that both the words "play" and "counters" have more than one meaning in Magic
Scout's Warning Scout's Warning is a 1-mana white instant that gives your next creature spell flash and draws you a card
Ramp with cards like Iron Myr, reduce casting costs with cards like Foundry Inspector and Jhoira's Familiar, and finally cast big artifacts like Threefold Thunderhulk
The real charm lies in the activated ability, which is expensive, but lets you connect for plenty of damage, and more importantly, card draw
2 Trinket Mage $0.25 Trinket Mage is one of blue's 'fabricate mages,' a subset of three-mana 2/2s that find artifacts with a specific mana value
The "only once each turn" restriction applies to each ability individually, even if multiples of the same card were exiled to craft Locus of Enlightenment