If at least one of the first two has taken the offer, they might as well take it too
If gaming pulls some evil out of you, and you like to show cards to your opponent and then make them discard those cards, then you can put these to good use: Razorkin Needlehead, Smothering Tithe, and Fate Unraveler
Whenever another creature you control with flying enters, this creature gets +1/+1 until end of turn

Here are the individual card changes, provided with brief justifications: CUTS: ARTIFACT Arcum's Astrolabe: All snow cards have been cut to remove the inclusion of snow-covered basics when building decks Ankh of Mishra: Too weak in power level Coalition Relic: Too much utility for general decks Coat of Arms: Ideally, this card would often be symmetrical, since opposing players would have tribal synergies, thus making it too weak in power level Coercive Portal: Too strong Coldsteel Heart: All snow cards have been cut to remove the inclusion of snow-covered basics when building decks Crowded Crypt: Creates zombie creature tokens, a creature type not supported in Cumly Cube 1.2 Explorer's Scope: Too strong and too much variability Fellwar Stone: Too strong Glasses of Urza: Too weak in power level Grafted Skullcap: Too narrow Mask of Memory: Too much utility for general decks Paladin's Shield: Too weak in power level Scroll Rack: Too little synergy with the rest of the card pool Sword of Feast and Famine: Protection leads to less interactive games, a dynamic not desirable in Cumly Cube Sword of Fire and Ice: Protection leads to less interactive games, a dynamic not desirable in Cumly Cube Sword of Light and Shadow: Protection leads to less interactive games, a dynamic not desirable in Cumly Cube Sword of Truth and Justice: Protection leads to less interactive games, a dynamic not desirable in Cumly Cube Talisman of Conviction: Too powerful Talisman of Hierarchy: Too powerful Talisman of Resilience: Too powerful CREATURE Allosaurus Shepherd: Removed to lower the presence of elves and green creatures Angelic Curator: Too weak in power level

It's also good in the 99 of those brews in addition to leading them, and it's quite strong here
It was commissioned by Wizards of the Coast in mid-1998 as a "presentation" card, a template to convince Nintendo of the viability of the English-speaking market