Should I have ranked it as #1 for this reason
It may cost you a little lore early on and force you to play the control side of the matchup, but its better to have the ink down every turn than another copy of Flounder on the board

Aberrant Aeromunculus Agent Frank Horrigan Alpha Deathclaw Aquastrand Spider Beast, Erudite Aerialist Bebop & Rocksteady Big Bertha Bioessence Hydra Biomancer's Familiar Black Tom Cassidy Colossus, Steel Stalwart Cytoplast Root-Kin Cytospawn Shambler Darwin, Adaptive Mutant Doorman Elusive Krasis Elvish Aberration Elvish Soultiller Evolution Witness Experiment Kraj Flatman Foe-liage Genghis Frog Glowing One Groundchuck & Dirtbag Harold and Bob, First Numens Hauntwoods Shrieker Heroes in a Half Shell Ice Cream Kitty Indominus Rex, Alpha Indoraptor, the Perfect Hybrid Krosan Cloudscraper Leatherhead, Iron Gator Leatherhead, Swamp Stalker Lily Bowen, Raging Grandma Lumbering Megasloth Marcus, Mutant Mayor Merfolk Skydiver Michelangelo, Game Master Michelangelo, Improviser Michelangelo, Mutant BFF Michelangelo, On the Scene Michelangelo, Weirdness to 11 Michelangelo, the Heart Mikey & Don, Party Planners Mikey & Leo, Chaos & Order Mikey & Mona, Mutant Sitters Mister Immortal Mona Lisa, Ever Adaptable Mona Lisa, Science Geek Ms

Its just not as powerful, in my opinion
With Sidar, you can pitch Knight cards you dont need or cant cast right away in exchange for digging through your deck for cards you can make better use of right away
Illustrated by: Alayna Danner Not Legal Traditional Standard Not Legal Traditional Alchemy Not Legal Traditional Explorer Not Legal Traditional Historic Not Legal Traditional Timeless Rulings 2013-07-01 Abilities that Slivers grant, as well as power/toughness boosts, are cumulative