It's clear that he was meant to be a fun casual card for Commander tables and the like, but it turned out he did just the right things for just the right costs to be viable enough
In Magic: The Gathering, you take on the role of a powerful mage, casting spells in epic battles with your friends
Before the various Portal and Starter sets became legal, the biggest pushback against their inclusion in various formats was that two amazing cards would get added to games and warp metagames and such -the horsemanship ability, which was essentially unblockable, and Jungle Lion
(You may cast a spell for its freerunning cost if you dealt combat damage to a player this turn with an Assassin or commander.) Whenever Ezio deals combat damage to a player, you may pay if that player has 10 or less life
Creatures (32) 4 Bonescythe Sliver 4 Blur Sliver 2 Battle Sliver 2 Megantic Sliver 4 Predatory Sliver 4 Galerider Sliver 4 Manaweft Sliver 4 Sylvan Caryatid 4 Sliver Hivelord Lands (24) Spells (4) This is obviously the roughest of rough lists, but gives a general direction of where you might go if youre looking to maximize Sliver synergies
These aren't found in the main set, so they won't be Standard legal, but this is a valuable reprint (each shock land is around $15-20 currently, that does provide a bonus reason to pick up the box