Every Magic set, Tales of Middle-earth included, spreads its cards across a variety of booster packs: Jumpstart Boosters: These 20-card packs are designed for super quick deck construction: you buy two, shuffle them together, and you have a reasonably viable deck to play against another opponents jumpstart deck
In the case of flicker, you do not have the opportunity to pay the offspring cost, but if a card is bounced back to the hand, you would be able to recast it and get offspring again
Here are the cards you need for 'Smeargle's Colorful Collection' secret mission: Chikorita #162 (Full Artwork / One Gold Star) Cyndaquil #165 (Full Artwork / One Gold Star) Totodile #167 (Full Artwork / One Gold Star) Pichu #171 (Full Artwork / One Gold Star) Togepi #173 (Full Artwork / One Gold Star) Gligar #176 (Full Artwork / One Gold Star) Spinarak #177 (Full Artwork / One Gold Star) Scizor #180 (Full Artwork / One Gold Star) Sentrat #181 (Full Artwork / One Gold Star) Smeargle #184 (Full Artwork / One Gold Star) Rewards: Smeargle Emblem Eevee Museum As the name suggests, the 'Eevee Museum' secret mission is all about collecting all of Eevee cards in the Eevee Grove booster pack
My slightly modified list is probably worse than the original, but were showing off warp this way
Buying and selling proxies is crossing the Rubicon into counterfeiting territory, and will definitely upset Wizards
I Will think about it