Ordinarily you'll need to pay ink to Boost, but there are other ways to trigger it
The first 2 and Attribute based ones all require exact Levels for the tributes

Other printings of Switch $24.84 Switch Primal Clash $0.18 Switch Roaring Skies $0.16 Switch Evolutions $0.07 Switch Sword & Shield $0.15 Switch Celestial Storm Switch Shining Legends $0.15 Switch Sun & Moon $7.92 Switch Sun & Moon Most valuable cards in HeartGold & SoulSilver View the full price guide $182.02 Lugia LEGEND HeartGold & SoulSilver $168.40 Lugia LEGEND HeartGold & SoulSilver $124.97 Gyarados HeartGold & SoulSilver $119.02 Ho-Oh LEGEND HeartGold & SoulSilver $79.21 Ho-Oh LEGEND HeartGold & SoulSilver $58.89 Alph Lithograph HeartGold & SoulSilver $44.59 Darkness Energy HeartGold & SoulSilver $39.15 Typhlosion HeartGold & SoulSilver More cards by Hideaki Hakozaki $160.04 Umbreon HSUndaunted $117.01 Mew HSTriumphant $90.11 Houndoom HSUndaunted $84.82 Espeon HSUndaunted $38.49 Absol HSTriumphant $34.91 Crobat HSUnleashed $33.43 Suicune HGSS Black Star Promos $29.27 Celebi HSTriumphant Discover Keep browsing SetHeartGold & SoulSilver Most valuableTop 100 Pokmon cards You might also like...

Ulalek is very strong, and lets you double up on all your eldrazi for a low cost of two mana, while that trigger also doubles any other abilities and spells on the stack
This sealed lot includes eight sleeved Phantasmal Flames booster packs, each containing 10 cards, for a total of 80 trading cards pulled directly from the expansion
This is actually one of the cheapest versions of Ancient Tomb (and the second least expensive Ancient Tomb, only beaten by the base version of the Stellar Sights frame